Setup AnrController for StorageManagerService

If transcoding is enabled, the StorageManagerService configures an
AnrController to allow delaying the ANR dialog when apps are
transcoding.

In later cl, the actual delay will be delegated to the
ExternalStorageService (MediaProvider).

Test: Manual
Bug: 170486601
Change-Id: Iafefba6a24cca1da7a73c5364f34893bf1868bea