Add enums for 10bit color formats

To improve wide-color behavior it's useful to have more bits
per color component. This defines 10:10:10:2 and 10:10:10:X
for that use.
This can be used for any color space / dataspace that is
compatible with unsigned integer components, e.g. Display-P3,
BT2020, etc.
Test: TBD

Change-Id: I69647f6bb2d5b0666a0819b10ee42705361e267d
diff --git a/graphics/common/1.0/types.hal b/graphics/common/1.0/types.hal
index 6fddfaf..da36a60 100644
--- a/graphics/common/1.0/types.hal
+++ b/graphics/common/1.0/types.hal
@@ -38,6 +38,16 @@
     BGRA_8888          = 5,
 
     /*
+     * The following formats use 10bit integers for R, G, and B and
+     * 2 bits for alpha. This is used to improve color precision on
+     * wide-color devices, e.g. Display-P3 or scRGB.
+     *
+     * When used with ANativeWindow, the dataSpace field describes the color
+     * space of the buffer.
+     */
+    RGBA_1010102       = 0x2B,
+
+    /*
      * The following formats use a 16bit float per color component.
      *
      * When used with ANativeWindow, the dataSpace field describes the color