Adding clear task flag to fix update app bug (#3262)

* Adding clear task flag to fix update app bug

* Adding comments on flags

* Adding flags in one line

Co-authored-by: Manny Jimenez <[email protected]>

Author: manny-jimenez

firebase-app-distribution/src/main/java/com/google/firebase/app/distribution/internal/InstallActivity.java

@@ -142,7 +142,9 @@ private void startAndroidPackageInstallerIntent() {
       intent.setDataAndType(Uri.fromFile(apkFile), APK_MIME_TYPE);
     }
 
-    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+    // These flags open the installation activity in a new task and to prevent earlier installation
+    // tasks from causing future ones to fail we use the clear task flag
+    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
     LogWrapper.getInstance().v("Kicking off install as new activity");
     startActivity(intent);
   }