Add new features to tuner.

*) Support scan unlock event
*) Support get frontend hardware info.
*) Add scIndexMask to MediaEvent.
*) Support more AAC formats.
*) Move Lna to ITuner.

Bug: 203389496
Bug: 184017033
Bug: 202978951
Bug: 205265630
Bug: 203623028
Test: atest android.media.tv.tuner.cts on AIDL and HILD HALs.
Change-Id: Id1bf4f13e7afb5f4264bfc67ca7d822848c6e803