Make change and version bump to r_aml_300900000 for mainline module file: manifest.json

Change-Id: I2ace87ee332660e1532794d7a69c6b1a522b01f6
diff --git a/manifest.json b/manifest.json
index 7c089da..7303ef5 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,4 +1,4 @@
 {
   "name": "com.android.sdkext",
-  "version": 309999900
+  "version": 300900000
 }