Bug 1842736 - Video Background Playback should work between Regular Browsing and Private Browsing. (#3155)

(cherry picked from commit 130a495bea159be31ecf0659c399d4da1efdc418)

Co-authored-by: iorgamgabriel <iorgamgabriel@yahoo.com>

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

@@ -886,6 +886,7 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
 
     // Stop active media when activity is destroyed.
     private fun stopMediaSession() {
+        if (isFinishing) {
             components.core.store.state.tabs.forEach {
                 it.mediaSessionState?.controller?.stop()
             }
@@ -898,6 +899,7 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
                 )
             }
         }
+    }
 
     /**
      * Returns the [supportActionBar], inflating it if necessary.