Remove more unused code from GKI.

Specifically:
 - ISR code (since bluedroid is entirely userspace)
 - logging macros
 - newlines in log macros
 - GKI_get_time_stamp (unused function)
 - GKI_freeze
 - unused timer variables and macros

Change-Id: I8e0676c28842d87c4148059ebb0320367658bc16
8 files changed