Allow WearableSensingService to read from disk via Context#openFileInput

The open file request will be proxied via the process that called
WearableSensingManager#provideDataStream or #provideConnection. This
follows a similar pattern as VisualQueryDetectionService.

Test: atest CtsWearableSensingServiceTestCases
Bug: 330701114
Change-Id: I5f16d8a96d098eca6dfbf4e6416d72bd8ec1f996
8 files changed