Add RGBA_F16 to the AndroidBitmapFormat (NDK)

Bug: 135133301
Test: Id904c8cb4b22505635744ab271a639ace24ddbab

Update AndroidBitmapFormat to keep up with Bitmap.Config.

Change-Id: I3c17faf174b109b7c31c2eb5d1249bc881923b10
diff --git a/include/android/bitmap.h b/include/android/bitmap.h
index 2def64d..6fba0ac 100644
--- a/include/android/bitmap.h
+++ b/include/android/bitmap.h
@@ -60,6 +60,8 @@
     ANDROID_BITMAP_FORMAT_RGBA_4444 = 7,
     /** Alpha: 8 bits. */
     ANDROID_BITMAP_FORMAT_A_8       = 8,
+    /** Each component is stored as a half float. **/
+    ANDROID_BITMAP_FORMAT_RGBA_F16  = 9,
 };
 
 /** Bitmap info, see AndroidBitmap_getInfo(). */