Merge "Remove unneccessary restriction" into main

     *

     * The allocator should examine the usage bits passed in when allocating a

     * buffer with this format, and it should derive the pixel format from

     * those usage flags. This format must never be used with any of the

     * BufferUsage::CPU_* usage flags.

     * those usage flags.

     *

     * Even when the internally chosen format has an alpha component, the

     * clients must assume the alpha vlaue to be 1.0.