gralloc: Fix caching for rarely read/write flags

GRALLOC_USAGE_SW_WRITE_RARELY and GRALLOC_USAGE_SW_READ_RARELY
need to be compared directly since they share bits with
GRALLOC_USAGE_SW_WRITE_OFTEN and GRALLOC_USAGE_SW_READ_OFTEN.

Change-Id: I52692027033e1036e3ad960b9e03dd8ee60b4111
1 file changed