Convert lib to Android.bp

Prepping for new tests that use Android.bp
Test: make
Change-Id: Ic5722d459e25caa07dac9d58f8bc09e9ea5352b1
diff --git a/opengl/tests/Android.bp b/opengl/tests/Android.bp
new file mode 100644
index 0000000..bf7aeb1
--- /dev/null
+++ b/opengl/tests/Android.bp
@@ -0,0 +1,4 @@
+subdirs = [
+    "hwc",
+    "lib",
+]