[Media Projection] Implement server side logging of STATE_INITIATED

- Adds session id, time since last active, and other required fields
- Adds unit tests for the server side logger
- Adds correct host uid from SysUI

Change-Id: Icf29201bf90b01bdcbeb2c127f4bea175b0a8bde
Test: MediaProjectionMetricsLoggerTest.java
Test: MediaProjectionMetricsLoggerTest.kt
Test: MediaProjectionManagerServiceTest.java
Test: RecordingControllerTest.java
Test: Manually checking the logged atoms
Fixes: 304729581
Fixes: 304729462