Add CtsPhotoPickerTest into TEST_MAPPING

Bug: 186089715
Test: atest --test-mapping packages/providers/MediaProvider
Change-Id: I6a4b176f35ca2a8298793a8fa081e373bcf87e25
Merged-In: I6a4b176f35ca2a8298793a8fa081e373bcf87e25
(cherry picked from commit d7512194df370527c49867491b356e8c759a911a)
1 file changed