Avoid allocation on Java Binder fast path

We recently added a new API to the native Parcel class that avoids a
string allocation in enforceInterface.  Have the Java JNI glue for
Parcel use this new interface.

Test: builds
Change-Id: I50b29ef95e214812c5fa83514497e0a188a635aa

core/jni/android_os_Parcel.cpp

@@ -625,8 +625,8 @@ static void android_os_Parcel_enforceInterface(JNIEnv* env, jclass clazz, jlong
             IPCThreadState* threadState = IPCThreadState::self();
             const int32_t oldPolicy = threadState->getStrictModePolicy();
             const bool isValid = parcel->enforceInterface(
-                String16(reinterpret_cast<const char16_t*>(str),
-                         env->GetStringLength(name)),
+                reinterpret_cast<const char16_t*>(str),
+                env->GetStringLength(name),
                 threadState);
             env->ReleaseStringCritical(name, str);
             if (isValid) {