Add active source state changes to dumpsys

Keep a list of the last 10 changes to the internal active source state.
Also tracks whether the local device considers itself to be the active source and the caller of the active source change.

Bug: 164340069
Test: dumpsys hdmi_control
Change-Id: I1f2f52b644a093b0d3884aeebdc6436e4d50759d
11 files changed