gralloc: Fix RAW16 stride

RAW16 stride should be multiple of 16 pixels, not 32.

Change-Id: Ic5f6920402ba9600b983e457cfc6863888345fe8
diff --git a/libgralloc/alloc_controller.cpp b/libgralloc/alloc_controller.cpp
index 8dcc219..722fcf3 100644
--- a/libgralloc/alloc_controller.cpp
+++ b/libgralloc/alloc_controller.cpp
@@ -172,9 +172,11 @@
     {
         case HAL_PIXEL_FORMAT_YCrCb_420_SP:
         case HAL_PIXEL_FORMAT_YCrCb_420_SP_ADRENO:
-        case HAL_PIXEL_FORMAT_RAW_SENSOR:
             aligned_w = ALIGN(width, 32);
             break;
+        case HAL_PIXEL_FORMAT_RAW_SENSOR:
+            aligned_w = ALIGN(width, 16);
+            break;
         case HAL_PIXEL_FORMAT_RAW10:
             aligned_w = ALIGN(width * 10 /8, 16);
             break;