intent: support share with Ring

Change-Id: Ic6536bcb3c822a4c4c77194a9a012e321cfabde8
diff --git a/ring-android/app/src/main/res/layout/activity_share.xml b/ring-android/app/src/main/res/layout/activity_share.xml
new file mode 100644
index 0000000..87467de
--- /dev/null
+++ b/ring-android/app/src/main/res/layout/activity_share.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<fragment xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/shareFragment"
+    android:name="cx.ring.fragments.ShareWithFragment"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent" />