Add per-media-type logging for deletion

It would be good to print the number of deleted items by media type.
This is helpful to aid debugging.

Bug: 147880745
Test: manual
Test: atest MediaProviderTests
Change-Id: I87152e2fef5c8e5b59c8de4e07acb33a19eacdd7
Merged-In: I87152e2fef5c8e5b59c8de4e07acb33a19eacdd7
(cherry picked from commit 5ff614ecb6993b2ae62d23c693b787491286c8bf)
5 files changed