Bug 1852224 - Prevent background media from being stopped when existing application from an external link.

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

@@ -612,7 +612,8 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
         privateNotificationObserver?.stop()
         components.notificationsDelegate.unBindActivity(this)
 
-        if (this !is ExternalAppBrowserActivity) {
+        val activityStartedWithLink = startupPathProvider.startupPathForActivity == StartupPathProvider.StartupPath.VIEW
+        if (this !is ExternalAppBrowserActivity && !activityStartedWithLink) {
             stopMediaSession()
         }
     }

app/src/main/java/org/mozilla/fenix/perf/StartupPathProvider.kt

@@ -100,7 +100,6 @@ class StartupPathProvider {
 
         override fun onStop(owner: LifecycleOwner) {
             // Clear existing state.
-            startupPathForActivity = StartupPath.NOT_SET
             wasResumedSinceStartedState = false
         }
     }

app/src/test/java/org/mozilla/fenix/perf/StartupPathProviderTest.kt

@@ -108,12 +108,12 @@ class StartupPathProviderTest {
     }
 
     @Test
-    fun `GIVEN the app is launched to the homescreen and stopped WHEN getting the start up path THEN it is not set`() {
+    fun `GIVEN the app is launched to the homescreen with MAIN and stopped WHEN getting the start up path THEN it set to MAIN`() {
         every { intent.action } returns Intent.ACTION_MAIN
         launchApp(intent)
         stopLaunchedApp()
 
-        assertEquals(StartupPath.NOT_SET, provider.startupPathForActivity)
+        assertEquals(StartupPath.MAIN, provider.startupPathForActivity)
     }
 
     @Test
@@ -129,13 +129,13 @@ class StartupPathProviderTest {
     }
 
     @Test
-    fun `GIVEN the app is launched to the homescreen, stopped, and relaunched warm from the app switcher WHEN getting the start up path THEN it is not set`() {
+    fun `GIVEN the app is launched to the homescreen with MAIN, stopped, and relaunched warm from the app switcher WHEN getting the start up path THEN it set to MAIN'`() {
         every { intent.action } returns Intent.ACTION_MAIN
         launchApp(intent)
         stopLaunchedApp()
         startStoppedAppFromAppSwitcher()
 
-        assertEquals(StartupPath.NOT_SET, provider.startupPathForActivity)
+        assertEquals(StartupPath.MAIN, provider.startupPathForActivity)
     }
 
     @Test
@@ -159,7 +159,7 @@ class StartupPathProviderTest {
     }
 
     @Test
-    fun `GIVEN the app is launched, stopped, started from the app switcher and receives an intent in the foreground WHEN getting the start up path THEN it returns not set`() {
+    fun `GIVEN the app is launched with MAIN, stopped, started from the app switcher and receives an intent in the foreground WHEN getting the start up path THEN it returns MAIN`() {
         every { intent.action } returns Intent.ACTION_MAIN
         launchApp(intent)
         stopLaunchedApp()
@@ -167,7 +167,7 @@ class StartupPathProviderTest {
         every { intent.action } returns Intent.ACTION_VIEW
         receiveIntentInForeground(intent)
 
-        assertEquals(StartupPath.NOT_SET, provider.startupPathForActivity)
+        assertEquals(StartupPath.MAIN, provider.startupPathForActivity)
     }
 
     private fun launchApp(intent: Intent) {