libbinder_ndk: stability settings

Allow apex/vendor users to set stability.

Bug: 136027762
Test: binderStabilityTest
Test: manually creating a vendor service and
    checking for expected behavior
Change-Id: Icbf8b2fdb8af00a64fcbf7a1c2c29e640ac9da29
diff --git a/libs/binder/ndk/Android.bp b/libs/binder/ndk/Android.bp
index 6da3086..1beacdf 100644
--- a/libs/binder/ndk/Android.bp
+++ b/libs/binder/ndk/Android.bp
@@ -33,6 +33,7 @@
         "ibinder_jni.cpp",
         "parcel.cpp",
         "process.cpp",
+        "stability.cpp",
         "status.cpp",
         "service_manager.cpp",
     ],
@@ -54,7 +55,7 @@
     version_script: "libbinder_ndk.map.txt",
     stubs: {
         symbol_file: "libbinder_ndk.map.txt",
-        versions: ["29"],
+        versions: ["29", "30"],
     },
 }