[CDM] Check for system calling UID when backing up and restoring data

Bug: 370962373
Test: Manual test on POC
Flag: EXEMPT bugfix
(cherry picked from commit 692cddfb32abae6c77b00c4850fd36b7eaaf8c70)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:191638ababfc5b03d63264b8932c5903f18543ba)
Merged-In: I307940b7194dd17eacbbfb8be5c92ac21e688c65
Change-Id: I307940b7194dd17eacbbfb8be5c92ac21e688c65
1 file changed