Add FLAG_IMMUTABLE to PendingIntents

If your app targets Android 12, you must specify the mutability of each
PendingIntent object that your app creates. This additional requirement
improves your app's security.
https://developer.android.com/about/versions/12/behavior-changes-12#pending-intent-mutability

Android Lint is being updated, and adds an error-level check for this.

Bug: 247885568
Test: Presubmits
Change-Id: Ic658d2423e6db48383a84c44a86d50c2d17ede74

1 files changed, 2 insertions, 1 deletions

diff --git a/src/com/android/basicsmsreceiver/SmsMessageReceiver.java b/src/com/android/basicsmsreceiver/SmsMessageReceiver.java
index 0ee625b..cad866b 100755
--- a/src/com/android/basicsmsreceiver/SmsMessageReceiver.java
+++ b/src/com/android/basicsmsreceiver/SmsMessageReceiver.java
@@ -84,7 +84,8 @@ public class SmsMessageReceiver extends BroadcastReceiver {
         // intent of a previous message and notification.
         di.setType(Integer.toString(notificationId));
 
-        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, di, 0);
+        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, di,
+                PendingIntent.FLAG_IMMUTABLE);
         return pendingIntent;
     }