Revert "Specify explicitly FLAG_IMMUTABLE for PendingIntent"

This reverts commit 9cbb4fa4e7fb8935990d2077d70049c1bedf5c51.

Reason for revert: this change might cause NPE on Settings app.

Change-Id: I4fd5ec36941c7516a25eaff6d64bcf62e0de7b39
1 file changed