Add CTS test for public sdk extension properties am: 895c44793c am: 846c8e02fa

Original change: https://android-review.googlesource.com/c/platform/packages/modules/SdkExtensions/+/1515622

Change-Id: I44bb9c0012d051faa6cb8e4485e7de22ada7dd27
diff --git a/manifest.json b/manifest.json
index 92194e9..deeb29e 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,4 +1,4 @@
 {
   "name": "com.android.sdkext",
-  "version": 300900700
+  "version": 300000000
 }