Update changes.txt

Change-Id: Ib78872edf76f4da4d6ad243d6f14cfa5b491b2e4
(cherry picked from commit cd51cd5a6344edafb39924bab717dc03ca5800c3)
diff --git a/changes.txt b/changes.txt
index 1649586..d4ca45d 100644
--- a/changes.txt
+++ b/changes.txt
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 Change log for Android SDK Tools.
 
+Revision 22.2.1:
+- Emergency fix to new project templates.
+
+Revision 22.2.0:
+
+Revision 22:
+
 Revision 20:
 - Ant build system:
 - Ant build system: