RESTRICT AUTOMERGE backport "opp: validate that content uri belongs to current user"

Bug: 296915500
Flag: EXEMPT trivial fix with complete testing coverage
Test: atest GoogleBluetoothInstrumentationTests:BluetoothOppSendFileInfoTest
Ignore-AOSP-First: fix for undisclosed vulnerability
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:2c5add83a18d87ea4a46bc8ab7f675e32c8d6a56)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:0de38e22f1771fde73340d7b209342751616fa0b)
Merged-In: I0b6423025c95c13eeea3cbf584212913b5fbf307
Change-Id: I0b6423025c95c13eeea3cbf584212913b5fbf307