[fenix] For https://github.com/mozilla-mobile/fenix/issues/24040: App should not crash when the search widget is clicked while PIP mode is active (https://github.com/mozilla-mobile/fenix/pull/25410)

When the search event is from the search widget while PIP is active, the search fragment opens after the screen is unlocked. This avoids the issue of the search page opening in landscape mode and also the app doesn't crash.

Co-Authored-By: Mugurell <Mugurell@users.noreply.github.com>

Co-authored-by: indu <indu@ramkystech.com>

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

@@ -52,6 +52,7 @@ import mozilla.components.concept.storage.BookmarkNode
 import mozilla.components.concept.storage.BookmarkNodeType
 import mozilla.components.concept.storage.HistoryMetadataKey
 import mozilla.components.feature.contextmenu.DefaultSelectionActionDelegate
+import mozilla.components.feature.media.ext.findActiveMediaTab
 import mozilla.components.feature.privatemode.notification.PrivateNotificationFeature
 import mozilla.components.feature.search.BrowserStoreSearchAdapter
 import mozilla.components.service.fxa.sync.SyncReason
@@ -511,6 +512,11 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
             )
         )
 
+        val tab = components.core.store.state.findActiveMediaTab()
+        if (tab != null) {
+            components.useCases.sessionUseCases.exitFullscreen(tab.id)
+        }
+
         val intentProcessors =
             listOf(
                 CrashReporterIntentProcessor(components.appStore)

app/src/main/java/org/mozilla/fenix/browser/BaseBrowserFragment.kt

@@ -1321,7 +1321,7 @@ abstract class BaseBrowserFragment :
      * Exit fullscreen mode when exiting PIP mode
      */
     private fun pipModeChanged(session: SessionState) {
-        if (!session.content.pictureInPictureEnabled && session.content.fullScreen) {
+        if (!session.content.pictureInPictureEnabled && session.content.fullScreen && isAdded) {
             onBackPressed()
             fullScreenChanged(false)
         }