Add support for *_FP16 pixel formats

Bug: 32984164
Test: compile
Change-Id: I0851c62f140801c6784fdb597b3d947402aa5876
diff --git a/modules/gralloc/gralloc.cpp b/modules/gralloc/gralloc.cpp
index e9559e9..84133fd 100644
--- a/modules/gralloc/gralloc.cpp
+++ b/modules/gralloc/gralloc.cpp
@@ -210,6 +210,9 @@
 
     int bytesPerPixel = 0;
     switch (format) {
+        case HAL_PIXEL_FORMAT_RGBA_FP16:
+            bytesPerPixel = 8;
+            break;
         case HAL_PIXEL_FORMAT_RGBA_8888:
         case HAL_PIXEL_FORMAT_RGBX_8888:
         case HAL_PIXEL_FORMAT_BGRA_8888: