Audio Aidl: update switch handling

Remove default switch target handling for compile-time checking
of missing switch entries with -Werror,-Wswitch.

Compilation will fail if a new enum entry is added without
updating the aidl conversion.

Also change run time LOG_ALWAYS_FATAL failures to static compile time failures.

Test: compiles, boots
Bug: 175314803
Change-Id: I049faa30a0ea830b6ba8f550b041d9dbd21d881d