Add API getClientPid in ITvInputManager.aidl

This API is for TunerResourceManager to get the callingPid of a TIS
client from TIF with the sessionId provided by TIS when TIS requests
resources from the TunerResourceManager.

This CL is also handling the creating and storing mechanism of the
sessionId.

The sessionId is provided by TIF when TIS created session through
TIF.
The sessionId to clientPid mapping is saved in a global map
in TIF service.
It is passed to the vendor TIS through new public API
onCreateSession(inputId, sessionId)/onCreateRecordingSession(inputId,
sessionId).

Test: Run with CTS on Cuttlefish
Bug: 147380882

Change-Id: I344a812add4a9637bf7eb226e5e4e3ead5b456a2