Migrate MediaScannerConnection to using call().

As part of getting MediaProvider to compile against supported APIs,
we're moving to the call() method instead of IMediaScannerService.

Bug: 137890034
Test: atest --test-mapping packages/providers/MediaProvider
Test: atest cts/tests/tests/media/src/android/media/cts/MediaScanner*
Change-Id: Ie959daa7576214024150faf84b44cdba00119257
2 files changed