sf: Workaround BufferLayer::setBuffers issue on 1440p msm8974

* msm8974 EGL blobs are reporting wrong supported dimensions,
  which is only an issue on devices with 1440p panels
  (find7, lt03lte and g3 being the only known ones)
* Since we will not get any newer EGL blobs for msm8974,
  add an optional flag to skip the check that crashes
  surfaceflinger. Everything still operates normally like
  previous android versions.

Change-Id: I0ee5d97149713f5e024cd9f8014eca73d1ab2265