Subscribe to the microphone toggle state.

When the microphone toggle is on, all connections are clamped down to
200 Hz. When the microphone toggle is off, the original rates of
connections are recovered.

Test: atest CtsSensorTestCases CtsSensorRatePermissionTestCases
Bug: 136069189
Change-Id: Ifc446b726c4200e1a1dae5d7c3026238928383dc
8 files changed