Make change and version bump to r_aml_300900200 for mainline module file: manifest.json

Change-Id: Iabfcf77532d545e4fc94f67ad311b6990aa564e9
diff --git a/manifest.json b/manifest.json
index effbf94..a06d5e9 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,4 +1,4 @@
 {
   "name": "com.android.sdkext",
-  "version": 300900100
+  "version": 300900200
 }