Fix compilation error in AndroidImplementation.

Corrected the placement of `notifyPushCompletion()` in `AndroidImplementation.java` to resolve the "java.lang.Override is not a repeatable annotation type" error caused by improper nesting with `notifyCommandBehavior`.

This completes the cross-platform push completion support feature, which is OPT-IN via the `delayPushCompletion` build hint.

If the hint is present and true:
- Android: Acquires a `PARTIAL_WAKE_LOCK` upon receiving a push, releasing it only when `notifyPushCompletion()` is called.
- iOS: Delays firing the system completion handler until `notifyPushCompletion()` is called.

Builders have been updated to inject the necessary permissions and runtime properties.
Developer guide documentation has been updated.

Author: google-labs-jules[bot]

Ports/Android/src/com/codename1/impl/android/AndroidImplementation.java

@@ -2797,7 +2797,6 @@ public void exitApplication() {
         android.os.Process.killProcess(android.os.Process.myPid());
     }
 
-    @Override
     @Override
     public void notifyPushCompletion() {
         if (pushWakeLock != null && pushWakeLock.isHeld()) {
@@ -2809,6 +2808,7 @@ public void notifyPushCompletion() {
         }
     }
 
+    @Override
     public void notifyCommandBehavior(int commandBehavior) {
         if (commandBehavior == Display.COMMAND_BEHAVIOR_NATIVE) {
             if (getActivity() instanceof CodenameOneActivity) {