Make change and version bump to r_aml_300802900 for mainline module file: manifest.json

Change-Id: Ie381397eb788ad04582064fe5d362d2cc90f9ad4
diff --git a/manifest.json b/manifest.json
index 04ade14..93bac25 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,4 +1,4 @@
 {
   "name": "com.android.sdkext",
-  "version": 300802800
+  "version": 300802900
 }