Add an alias to jni_zero::AdoptRef and CreateLeaky in webrtc

Recently, JNI Zero has introduced two helper functions:
1. jni_zero::AdoptRef() which constructs a ScopedJavaLocalRef
2. jni_zero::CreateLeaky() which constructs a JavaRef

This CL adds aliases to these two functions in the webrtc namespace.
These aliases will be used later in google3.

Bug: chromium:481689330
Change-Id: I42f91ec95b2a6059335733fc95af046af5dfa80b
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/466660
Commit-Queue: Martin Kong <martinkong@google.com>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Evan Shrubsole <eshr@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#47555}

sdk/android/native_api/jni/scoped_java_ref.h

diff --git a/sdk/android/native_api/jni/scoped_java_ref.h b/sdk/android/native_api/jni/scoped_java_ref.h
index fc25b85..94a1ac1 100644
--- a/sdk/android/native_api/jni/scoped_java_ref.h
+++ b/sdk/android/native_api/jni/scoped_java_ref.h
@@ -21,6 +21,8 @@
 namespace webrtc {
 template <typename T>
 using JavaParamRef = jni_zero::JavaRef<T>;
+using jni_zero::AdoptRef;
+using jni_zero::CreateLeaky;
 using jni_zero::JavaRef;
 using jni_zero::ScopedJavaGlobalRef;
 using jni_zero::ScopedJavaLocalRef;