Add the downloader activity

Also untrack a whole lot of appcompat that shouldn't have been included

appcompat_v7/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,4 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.6
+org.eclipse.jdt.core.compiler.compliance=1.6
+org.eclipse.jdt.core.compiler.source=1.6

appcompat_v7/bin/jarlist.cache

@@ -1,3 +0,0 @@
-# cache for current jar dependency. DO NOT EDIT.
-# format is <lastModified> <length> <SHA-1> <path>
-# Encoding is UTF-8