opp: validate that content uri belongs to current user

Most helpers in ContentProvider are hidden.
Use ContentProvider.createContentUriForUser which
is callable by modules to validate the uri.

Bug: 296915500
Flag: EXEMPT fix for vulnerability
Test: atest GoogleBluetoothInstrumentationTests:BluetoothOppSendFileInfoTest#generateFileInfo_withContentUriForOtherUser_returnsSendFileInfoError
Ignore-AOSP-First: fix for undisclosed vulnerability
Change-Id: I13e3747b17017066c1bd3cc8cd5796eab2c3eb4f