Add libhwui, to hardware accelerate the Canvas API using OpenGL ES 2.0.

This is the initial checkin to setup the library and turn on OEGL ES 2.0
in ViewRoot, not a functional renderer.

Change-Id: I6655c54166e2967da2e21e7d6dcfba78bf113b44
diff --git a/core/jni/AndroidRuntime.cpp b/core/jni/AndroidRuntime.cpp
index cb215c00..cf766aa 100644
--- a/core/jni/AndroidRuntime.cpp
+++ b/core/jni/AndroidRuntime.cpp
@@ -114,6 +114,7 @@
 extern int register_android_graphics_PixelFormat(JNIEnv* env);
 extern int register_com_android_internal_graphics_NativeUtils(JNIEnv *env);
 extern int register_android_view_Display(JNIEnv* env);
+extern int register_android_view_GLES20Canvas(JNIEnv* env);
 extern int register_android_view_HardwareRenderer(JNIEnv* env);
 extern int register_android_view_Surface(JNIEnv* env);
 extern int register_android_view_ViewRoot(JNIEnv* env);
@@ -1213,6 +1214,7 @@
     REG_JNI(register_android_nio_utils),
     REG_JNI(register_android_graphics_PixelFormat),
     REG_JNI(register_android_graphics_Graphics),
+    REG_JNI(register_android_view_GLES20Canvas),
     REG_JNI(register_android_view_HardwareRenderer),
     REG_JNI(register_android_view_Surface),
     REG_JNI(register_android_view_ViewRoot),