pt 1 in reviving the android build (copied from pm 28a1, wish me luck)

mobile/android/extensions/flyweb/install.rdf.in

@@ -0,0 +1,31 @@
+<?xml version="1.0"?>
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+
+#filter substitution
+
+<RDF xmlns="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+     xmlns:em="http://www.mozilla.org/2004/em-rdf#">
+
+  <Description about="urn:mozilla:install-manifest">
+    <em:id>flyweb@mozilla.org</em:id>
+    <em:version>1.0.0</em:version>
+    <em:type>2</em:type>
+    <em:bootstrap>true</em:bootstrap>
+
+    <!-- Target Application this theme can install into,
+        with minimum and maximum supported versions. -->
+    <em:targetApplication>
+      <Description>
+        <em:id>@MOZ_APP_ID@</em:id>
+        <em:minVersion>@MOZ_APP_VERSION@</em:minVersion>
+        <em:maxVersion>@MOZ_APP_VERSION@</em:maxVersion>
+      </Description>
+    </em:targetApplication>
+
+    <!-- Front End MetaData -->
+    <em:name>FlyWeb</em:name>
+    <em:description>Discover nearby services in the browser</em:description>
+  </Description>
+</RDF>