OmniLib: Add an omnirom-internal filegroup

This lets us use our OmniSettings in frameworks/base/core.

Change-Id: I37150344879aa4d98aea8ded2d61127ad6d18972
diff --git a/Android.bp b/Android.bp
index 470a29a..1784ff6 100644
--- a/Android.bp
+++ b/Android.bp
@@ -38,6 +38,14 @@
     ],
 }
 
+filegroup {
+    name: "omnirom-internal",
+    srcs: [
+        "src/org/omnirom/omnilib/utils/OmniSettings.java",
+    ],
+    path: "src",
+}
+
 java_library {
     name: "OmniLib",
     installable: true,