SF: Extract onMessageInvalidate

Extracts onMessageInvalidate from onMessageReceived to make it
easier to attribute profiling results to it. Also renames
handleMessageRefresh to onMessageRefresh for consistency.

Test: build, boot, atest libsurfaceflinger_unittest
Bug: 153112939
Change-Id: Ie490113ee676ed6043bc0501ce7cd560f1f4b237