For #6755 - Exit PiP when launched externally with Intents

app/src/main/java/org/mozilla/focus/activity/MainActivity.kt

@@ -58,6 +58,9 @@ open class MainActivity : LocaleAwareAppCompatActivity() {
         updateSecureWindowFlags()
         super.onCreate(savedInstanceState)
 
+        // Checks if Activity is currently in PiP mode if launched from external intents, then exits it
+        checkAndExitPiP()
+
         if (!isTaskRoot) {
             if (intent.hasCategory(Intent.CATEGORY_LAUNCHER) && Intent.ACTION_MAIN == intent.action) {
                 finish()
@@ -112,6 +115,14 @@ open class MainActivity : LocaleAwareAppCompatActivity() {
         AppReviewUtils.showAppReview(this)
     }
 
+    private fun checkAndExitPiP() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N && isInPictureInPictureMode && intent != null) {
+            // Exit PiP mode
+            moveTaskToBack(false)
+            startActivity(Intent(this, this::class.java).setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT))
+        }
+    }
+
     final override fun onUserLeaveHint() {
         val browserFragment =
             supportFragmentManager.findFragmentByTag(BrowserFragment.FRAGMENT_TAG) as BrowserFragment?