Add equals method

This adds an equals method which will for now only be used in tests.

Test: atest BackgroundStartPrivilegesTest
Flag: EXEMPT test only
Bug: 322159724
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:f749fdc792476a52a9c07f282e27af90d21e6a4d)
Merged-In: Ia726fa205b73a693fee775e4a08950ecd4b5f882
Change-Id: Ia726fa205b73a693fee775e4a08950ecd4b5f882
2 files changed