SurfaceMediaSource: use the HW_TEXTURE usage bit

This change makes SurfaceMediaSource request Gralloc buffers with the
HW_TEXTURE usage bit rather than the VIDEO_ENCODER bit.  It is a
temporary workaround for what is likely a Gralloc bug.

Bug: 5771063
Change-Id: I9cce615e80fc14a1644fae27ba06970c262dd179

Author: Jamie Gennis

media/libstagefright/SurfaceMediaSource.cpp

@@ -336,7 +336,9 @@ status_t SurfaceMediaSource::dequeueBuffer(int *outBuf, uint32_t w, uint32_t h,
         (uint32_t(buffer->height) != h) ||
         (uint32_t(buffer->format) != format) ||
         ((uint32_t(buffer->usage) & usage) != usage)) {
-            usage |= GraphicBuffer::USAGE_HW_VIDEO_ENCODER;
+            // XXX: This will be changed to USAGE_HW_VIDEO_ENCODER once driver
+            // issues with that flag get fixed.
+            usage |= GraphicBuffer::USAGE_HW_TEXTURE;
             status_t error;
             sp<GraphicBuffer> graphicBuffer(
                     mGraphicBufferAlloc->createGraphicBuffer(