Fix IWallpaperEngineWrapper NPE in wearOS

A crash was detected in wearOS. Simply add a null check to avoid that.

Bug: 282156194
Test: treehugger (very safe, just a null check)
Change-Id: I016c3c942b1b0099eaa423cad4b4d60c90804c79

parent 096bfe59

core/java/android/service/wallpaper/WallpaperService.java

+1 −1

Original line number	Diff line number	Diff line
		@@ -2231,7 +2231,7 @@ public abstract class WallpaperService extends Service {

		mDestroyed = true;

		if (mIWallpaperEngine.mDisplayManager != null) {
		if (mIWallpaperEngine != null && mIWallpaperEngine.mDisplayManager != null) {
		mIWallpaperEngine.mDisplayManager.unregisterDisplayListener(mDisplayListener);
		}