Use Context#startForegroundService in MTP provider

NotificationManager.startServiceInForeground() was moved to
Context#startForegroundService. MtpDocumentsProvider should use new one.

Bug: 36794559
Test: MtpDocumentsProviderTests
Change-Id: I84723ee8c3f0f8bfe4d5ea8ad035c01c42ce8bab
4 files changed
tree: fc7820c447c676574b5a03224f6451905b545d25
  1. perf_tests/
  2. res/
  3. src/
  4. tests/
  5. Android.mk
  6. AndroidManifest.xml
  7. proguard.flags