Merge "SAP: Mark the PendingIntents with FLAG_IMMUTABLE" am: 996801cfec am: 39d124479a

Original change: https://android-review.googlesource.com/c/platform/packages/apps/Bluetooth/+/1566073

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: If21eaf9d9cc8097958cca3498b3f6ba2671b5f02