Set explicit package name on Intent for showing TV PiP

We broadcast an intent when opening the TV PiP menu, which is received
by SystemUI. This causes a warning since sending non-protected
broadcasts is dangerous. Setting the package name explicitly lets
ActivityManagerService determine that the broadcast is safe since
it is only sent within SystemUI.

Bug: 222250868
Fix: 222250868
Test: Open PiP, `adb shell input keyevent WINDOW`, observe logcat
Change-Id: I833752a52774ca933724f64a02edc45c898b080b

packages/SystemUI/src/com/android/systemui/statusbar/tv/TvStatusBar.java

@@ -73,6 +73,8 @@ public class TvStatusBar extends CoreStartable implements CommandQueue.Callbacks
 
     @Override
     public void showPictureInPictureMenu() {
-        mContext.sendBroadcast(new Intent(ACTION_SHOW_PIP_MENU), SYSTEMUI_PERMISSION);
+        mContext.sendBroadcast(
+                new Intent(ACTION_SHOW_PIP_MENU).setPackage(mContext.getPackageName()),
+                SYSTEMUI_PERMISSION);
     }
 }