For #18727: Exit PiP when launched externally with Intents

app/src/main/java/org/mozilla/fenix/HomeActivity.kt

@@ -7,6 +7,7 @@ package org.mozilla.fenix
 import android.content.Context
 import android.content.Intent
 import android.content.Intent.ACTION_MAIN
+import android.content.Intent.FLAG_ACTIVITY_REORDER_TO_FRONT
 import android.content.res.Configuration
 import android.os.Build
 import android.os.Bundle
@@ -188,6 +189,9 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
             super.onCreate(savedInstanceState)
         }
 
+        // Checks if Activity is currently in PiP mode, then exits it
+        checkAndExitPiP()
+
         // Diagnostic breadcrumb for "Display already aquired" crash:
         // https://github.com/mozilla-mobile/android-components/issues/7960
         breadcrumb(
@@ -266,6 +270,15 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
         StartupTimeline.onActivityCreateEndHome(this) // DO NOT MOVE ANYTHING BELOW HERE.
     }
 
+
+    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(FLAG_ACTIVITY_REORDER_TO_FRONT))
+        }
+    }
+
     private fun startupTelemetryOnCreateCalled(safeIntent: SafeIntent) {
         // We intentionally only record this in HomeActivity and not ExternalBrowserActivity (e.g.
         // PWAs) so we don't include more unpredictable code paths in the results.