Revert "get rid of HAL pixelformats 5551 and 4444"

This reverts commit e4001e736d35179a0a3fec751906ce41e4458745.

Change-Id: Ic09ba8bc5b0784bce07e8800f6276b3290bc0e7a
diff --git a/libgralloc/alloc_controller.cpp b/libgralloc/alloc_controller.cpp
index c361095..b13166d 100644
--- a/libgralloc/alloc_controller.cpp
+++ b/libgralloc/alloc_controller.cpp
@@ -141,6 +141,8 @@
                 bpp = 3;
                 break;
             case HAL_PIXEL_FORMAT_RGB_565:
+            case HAL_PIXEL_FORMAT_RGBA_5551:
+            case HAL_PIXEL_FORMAT_RGBA_4444:
                 bpp = 2;
                 break;
             default: break;
@@ -400,6 +402,8 @@
             size = alignedw * alignedh * 3;
             break;
         case HAL_PIXEL_FORMAT_RGB_565:
+        case HAL_PIXEL_FORMAT_RGBA_5551:
+        case HAL_PIXEL_FORMAT_RGBA_4444:
         case HAL_PIXEL_FORMAT_RAW_SENSOR:
             size = alignedw * alignedh * 2;
             break;