Merge "Clarify format BLOB locking"

     * acceptable.

     *

     * 1D buffers (width = size in bytes, height = 1, pixel_format = BLOB) must

     * "lock in place". The buffers must be directly accessible via mapping.

     * "lock in place" and behave similar to shared memory. That is, multiple threads or processes

     * may lock the buffer for reading & writing and the results must follow the device's memory

     * model.

     *

     * The client must not modify the content of the buffer outside of

     * @p accessRegion, and the device need not guarantee that content outside