Modularize failureaccess.

This is the next piece of #7094, which is progress toward [modularization](#2970).

I've modified this CL somewhat from the original version so that I can deploy a new version of `failureaccess` without needing to make any updates to `guava-parent` first. `failureaccess` does still use `guava-parent` (and I've bumped it to use the newest released version) for its configuration for Sonatype, Javadoc, etc. But I've inlined all the configuration that I need for the modularization.

I did note a few differences from the original version:
- This version includes `LICENSE` under `META-INF`, both in the main jar and in the sources jars.
- This version uses a different configuration for Javadoc, I assume because my recent changes there didn't make it into 33.4.0.

I also notice that _neither_ version contains `module-info.java` in its source jar. We could presumably fix that in the future if anyone is interested.

(And while this isn't strictly related, I do notice that we could consider also releasing a modularized version of `listenablefuture` someday.)

I have tested with:

```
$ JAVA_HOME=$HOME/.m2/jdks/jdk-17.0.13+11 ./mvnw clean install -Psonatype-oss-release -Dmaven.test.redirectTestOutputToFile=true -Dsurefire.printSummary=false -Drelease -f futures/failureaccess
```

(Some of those flags aren't necessary, but I found it easiest to copy what our release script does for "normal" releases.)

I would use `deploy` instead of `install` for the real thing.

Relates-To: elide-dev/jpms#1
Signed-off-by: Sam Gammon <[email protected]>
RELNOTES=Changed the `failureaccess` jar to be a modular jar.
PiperOrigin-RevId: 726100871

futures/failureaccess/pom.xml

@@ -5,11 +5,11 @@
   <parent>
     <groupId>com.google.guava</groupId>
     <artifactId>guava-parent</artifactId>
-    <version>26.0-android</version>
+    <version>33.4.0-android</version>
   </parent>
   <artifactId>failureaccess</artifactId>
-  <version>1.0.2</version>
-  <packaging>bundle</packaging>
+  <version>1.0.3</version>
+  <packaging>jar</packaging>
   <name>Guava InternalFutureFailureAccess and InternalFutures</name>
   <description>
     Contains
@@ -22,14 +22,67 @@
   </description>
   <build>
     <plugins>
+      <plugin>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <executions>
+          <execution>
+            <id>default-compile</id>
+            <goals>
+              <goal>compile</goal>
+            </goals>
+            <configuration>
+              <release>8</release>
+              <excludes>
+                <exclude>module-info.java</exclude>
+              </excludes>
+              <compilerArgs>
+                <!--
+                    Make includes/excludes fully work:
+                    https://issues.apache.org/jira/browse/MCOMPILER-174
+                    (Compare what guava-gwt has to do for maven-javadoc-plugin.)
+                -->
+                <arg>-sourcepath</arg>
+                <arg>doesnotexist</arg>
+              </compilerArgs>
+            </configuration>
+          </execution>
+          <execution>
+            <id>compile-java9</id>
+            <goals>
+              <goal>compile</goal>
+            </goals>
+            <configuration>
+              <release>9</release>
+              <compileSourceRoots>
+                <compileSourceRoot>${project.basedir}/src</compileSourceRoot>
+              </compileSourceRoots>
+
+              <!-- JPMS needs access to the module sources to complete a modular Java build. -->
+              <compilerArgs>
+                <arg>-sourcepath</arg>
+                <arg>${project.basedir}/src</arg>
+                <arg>--add-reads=com.google.common=ALL-UNNAMED</arg>
+                <!-- https://errorprone.info/docs/installation#maven -->
+                <arg>-XDcompilePolicy=simple</arg>
+              </compilerArgs>
+              <multiReleaseOutput>true</multiReleaseOutput>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
       <plugin>
         <artifactId>maven-jar-plugin</artifactId>
         <configuration>
           <archive>
+            <manifestFile>${project.build.outputDirectory}/META-INF/MANIFEST.MF</manifestFile>
             <manifestEntries>
-              <Automatic-Module-Name>com.google.common.util.concurrent.internal</Automatic-Module-Name>
+              <Multi-Release>true</Multi-Release>
             </manifestEntries>
           </archive>
+          <excludes>
+            <exclude>/module-info.class</exclude>
+            <exclude>META-INF/versions/9/com/google/common/util/concurrent/internal/*.class</exclude>
+          </excludes>
         </configuration>
       </plugin>
       <plugin>
@@ -55,7 +108,9 @@
         </executions>
         <configuration>
           <instructions>
-            <Export-Package>com.google.common.util.concurrent.internal</Export-Package>
+            <!-- Silence a warning that claims that META-INF/versions/9/... is the "wrong directory" for our classes. -->
+            <_fixupmessages>^Classes found in the wrong directory: .*</_fixupmessages>
+            <Export-Package>com.google.common.util.concurrent.internal,!META-INF.*</Export-Package>
             <Bundle-DocURL>https://github.com/google/guava/</Bundle-DocURL>
           </instructions>
         </configuration>

futures/failureaccess/src/module-info.java

@@ -0,0 +1,18 @@
+/*
+ * Copyright (C) 2024 The Guava Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+/** Guava: {@code Future} Internals. */
+module com.google.common.util.concurrent.internal {
+  exports com.google.common.util.concurrent.internal;
+}