Update version code for sdkextensions

Bug: 174770911
Test: build & install the module on an R device
Change-Id: I1e4776652a1d3d53f8ea69c6415199c0b48fca03
diff --git a/manifest.json b/manifest.json
index deeb29e..7c089da 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,4 +1,4 @@
 {
   "name": "com.android.sdkext",
-  "version": 300000000
+  "version": 309999900
 }