Fix crash in InputManagerService

We are currently storing a local variable into permanent storage, which
causes jni abort, unsurprisingly. Make this a global ref instead.

Bug: 120255803
Test: eng build boots properly
Change-Id: Ie572d7cfdb6799af99c10aa8ade96c0fbc4eab2b

services/core/jni/com_android_server_input_InputManagerService.cpp

@@ -1750,7 +1750,7 @@ int register_android_server_InputManager(JNIEnv* env) {
 
     jclass clazz;
     FIND_CLASS(clazz, "com/android/server/input/InputManagerService");
-    gServiceClassInfo.clazz = clazz;
+    gServiceClassInfo.clazz = reinterpret_cast<jclass>(env->NewGlobalRef(clazz));
 
     GET_METHOD_ID(gServiceClassInfo.notifyConfigurationChanged, clazz,
             "notifyConfigurationChanged", "(J)V");