Revert "get rid of HAL pixelformats 5551 and 4444"

This reverts commit e4001e736d35179a0a3fec751906ce41e4458745.

Change-Id: Ic09ba8bc5b0784bce07e8800f6276b3290bc0e7a
diff --git a/libcopybit/copybit.cpp b/libcopybit/copybit.cpp
index 2302d64..bd9fc1a 100644
--- a/libcopybit/copybit.cpp
+++ b/libcopybit/copybit.cpp
@@ -440,6 +440,8 @@
                 // we don't support plane alpha with RGBA formats
                 case HAL_PIXEL_FORMAT_RGBA_8888:
                 case HAL_PIXEL_FORMAT_BGRA_8888:
+                case HAL_PIXEL_FORMAT_RGBA_5551:
+                case HAL_PIXEL_FORMAT_RGBA_4444:
                     ALOGE ("%s : Unsupported Pixel format %d", __FUNCTION__,
                            src->format);
                     return -EINVAL;