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.

CRs-fixed: 569559

Change-Id: I52692027033e1036e3ad960b9e03dd8ee60b4111
Merge "hwc: Add support for Secure display"
hwc: remove unblanking fb from openframebufferdevice

- unblaking fb is done as part of surface flinger initialization
  so its not required here

Change-Id: Ifaed119503c74b5a75ffd6694d3508c4c15dfb60
Merge branch 'kk_2.7_rb1.13' of git://codeaurora.org/platform/hardware/qcom/display into cm-11.0