Changes associated with the new geotz module

The new geotz module has files that need to be readable by the system
process.

Bug: 172546738
Test: build / boot
Change-Id: I4b9867fa1f738b0fabdf5b72e9e73282f1bd9cbc
diff --git a/apex/Android.bp b/apex/Android.bp
index 2347bc2..53303c6 100644
--- a/apex/Android.bp
+++ b/apex/Android.bp
@@ -77,6 +77,13 @@
 }
 
 filegroup {
+  name: "com.android.geotz-file_contexts",
+  srcs: [
+    "com.android.geotz-file_contexts",
+  ],
+}
+
+filegroup {
   name: "com.android.gki-file_contexts",
   srcs: [
     "com.android.gki-file_contexts",