Surfaceflinger: Remove ifdef on GRALLOC_USAGE_HW_RENDER | GRALLOC_USAGE_HW_TEXTURE

https://github.com/omnirom/android_frameworks_native/commit/e0c4ab43ce7a851ab5fefbd2e8e259daf1c48c68

The above revert commit brought the if (!useReadPixels) statement back in when it isn't
necessary.

Huge thanks to ankitkv for discovering this!

Change-Id: Ifceb27c836ad9c2d73f48127727ba5d2849e5daf
Merge "Surfaceflinger: Remove ifdef on GRALLOC_USAGE_HW_RENDER | GRALLOC_USAGE_HW_TEXTURE" into android-4.4