Revert "OPP: Do not trimDatabase if ContentProvider doesn't exist"

This reverts commit I215dcc477cdda567feeed9d0d9c39c0a45f1b940

This commit was accidentally added in ag/21002020 and missed in the
revert ag/21690645. Hence, reverting it here.

Ignore-AOSP-First: Does not need to be removed from AOSP
Test: atest BluetoothOppServiceTest
Reason for revert: b/266459454

Change-Id: I5b9e2f8dcd32b902ebd242bfafe115a58e1789a4