Make change and version bump to r_aml_300900100 for mainline module file: manifest.json

Change-Id: I432249e47f145484e1e797c320d551646464c87a
diff --git a/manifest.json b/manifest.json
index 7c089da..effbf94 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,4 +1,4 @@
 {
   "name": "com.android.sdkext",
-  "version": 309999900
+  "version": 300900100
 }