libbinder_ndk: make AIBinder_isRemote const.

It's a C function, so it is not const, but it now takes a const
AIBinder object.

There isn't a way to do a check on a const IBinder if it is remote. We
could store the isRemote status as a member of AIBinder to avoid this,
but this would be wasted space. A const isRemote method can't be added
to IBinder for legacy reasons.

Bug: 111445392
Test: ./ndk/runtests.sh
Change-Id: I72df61e429e06e24dcffd4158447670ec1b41d7a
diff --git a/libs/binder/ndk/AIBinder.cpp b/libs/binder/ndk/AIBinder.cpp
index fe07914..f452511 100644
--- a/libs/binder/ndk/AIBinder.cpp
+++ b/libs/binder/ndk/AIBinder.cpp
@@ -183,7 +183,7 @@
     return ret.get();
 }
 
-bool AIBinder_isRemote(AIBinder* binder) {
+bool AIBinder_isRemote(const AIBinder* binder) {
     if (binder == nullptr) {
         return true;
     }