adjust flag definitions to upstream changes

Author: muhomorr

android/TerminalApp/java/com/android/system/virtualmachine/flags/Flags.kt

@@ -0,0 +1,6 @@
+package com.android.system.virtualmachine.flags;
+
+object Flags {
+    fun terminalGuiSupport(): Boolean = true
+    fun terminalStorageBalloon(): Boolean = false
+}

android/TerminalApp/java/com/android/virtualization/terminal/Flags.kt

@@ -49,6 +49,7 @@ import androidx.activity.viewModels
 import androidx.viewpager2.widget.ViewPager2
 import com.android.internal.annotations.VisibleForTesting
 import com.android.microdroid.test.common.DeviceProperties
+import com.android.system.virtualmachine.flags.Flags
 import com.android.virtualization.terminal.ErrorActivity.Companion.start
 import com.android.virtualization.terminal.VmLauncherService.VmLauncherServiceCallback
 import com.google.android.material.tabs.TabLayout

android/TerminalApp/java/com/android/virtualization/terminal/MainActivity.kt

@@ -34,6 +34,7 @@ import android.webkit.WebViewClient
 import android.widget.TextView
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.activityViewModels
+import com.android.system.virtualmachine.flags.Flags
 import com.android.virtualization.terminal.CertificateUtils.createOrGetKey
 import com.android.virtualization.terminal.CertificateUtils.writeCertificateToFile
 import java.security.PrivateKey
@@ -201,7 +202,7 @@ class TerminalTabFragment() : Fragment() {
 
     private fun updateMainActivity() {
         val mainActivity = (activity as MainActivity)
-        if (terminalGuiSupport()) {
+        if (Flags.terminalGuiSupport()) {
             mainActivity.displayMenu!!.visibility = View.VISIBLE
             mainActivity.displayMenu!!.isEnabled = true
         }

android/TerminalApp/java/com/android/virtualization/terminal/TerminalTabFragment.kt

@@ -40,6 +40,7 @@ import android.system.virtualmachine.VirtualMachineException
 import android.util.Log
 import android.widget.Toast
 import androidx.annotation.WorkerThread
+import com.android.system.virtualmachine.flags.Flags
 import com.android.virtualization.terminal.InstalledImage.Companion.roundUp
 import com.android.virtualization.terminal.MainActivity.Companion.PREFIX
 import com.android.virtualization.terminal.MainActivity.Companion.TAG