Fix incorrect updates of BUCKET_ID/BUCKET_DISPLAY_NAME.

Whenever any image/video gets updated, MediaProvider is incorrectly
setting BUCKET_ID/BUCKET_DISPLAY_NAME values to null. They shouldn't
be changed unless the filepath gets updated.

Bug: 122788554
Test: manual
Test: atest cts/tests/tests/provider/src/android/provider/cts/MediaStore*
Change-Id: I5254a5f7da5ec760046d54c26b35b8288d1da0dc
2 files changed