[temporalio#1727] Use default RetryOptions for LocalActivities when not set or setMaximumAttempts(0)

Setting setMaximumAttempts=0 (or not setting any value, default = 0) for local activities should make the activity retry forever.

This is currently broken because the logic treats both no policy set and a policy with all default values (including MaxiumAttempts = 0)
as abort conditional.  What should happen (at least according the doc and to align with normal activities) is that no policy set should
be processed according to the default values of the retry policy, which includes unlimited retries when the MaxiumAttempts = 0.

Fixes temporalio#1727

Signed-off-by: Greg Haskins <[email protected]>

Author: ghaskins

Diff for: temporal-sdk/src/main/java/io/temporal/internal/worker/LocalActivityWorker.java

@@ -127,6 +127,14 @@ private void submitAttempt(
     slotQueue.submitAttempt(reservationDat, isRetry, task);
   }
 
+  private RetryOptions getRetryOptions(PollActivityTaskQueueResponseOrBuilder activityTask) {
+    if (isRetryPolicyNotSet(activityTask)) {
+      return RetryOptions.getDefaultInstance();
+    } else {
+      return RetryOptionsUtils.toRetryOptions(activityTask.getRetryPolicy());
+    }
+  }
+
   /**
    * @param executionContext execution context of the activity
    * @param activityTask activity task
@@ -154,11 +162,7 @@ private RetryDecision shouldRetry(
       throw (Error) attemptThrowable;
     }
 
-    if (isRetryPolicyNotSet(activityTask)) {
-      return new RetryDecision(RetryState.RETRY_STATE_RETRY_POLICY_NOT_SET, null);
-    }
-
-    RetryOptions retryOptions = RetryOptionsUtils.toRetryOptions(activityTask.getRetryPolicy());
+    RetryOptions retryOptions = getRetryOptions(activityTask);
 
     if (RetryOptionsUtils.isNotRetryable(retryOptions, attemptThrowable)) {
       return new RetryDecision(RetryState.RETRY_STATE_NON_RETRYABLE_FAILURE, null);
@@ -368,11 +372,7 @@ private RetryState shouldStillRetry(
         @Nullable Failure previousLocalExecutionFailure) {
       int currentAttempt = activityTask.getAttempt();
 
-      if (isRetryPolicyNotSet(activityTask)) {
-        return RetryState.RETRY_STATE_RETRY_POLICY_NOT_SET;
-      }
-
-      RetryOptions retryOptions = RetryOptionsUtils.toRetryOptions(activityTask.getRetryPolicy());
+      RetryOptions retryOptions = getRetryOptions(activityTask);
 
       if (previousLocalExecutionFailure != null
           && previousLocalExecutionFailure.hasApplicationFailureInfo()