Refactor InputTransferToken equality

Bug: 361588984
Flag: EXEMPT refactor
Test: presubmits
Change-Id: Ib5c8b5e342fddfea7672320e6adc7197b210bf9a

Author: patrickdwilliams

libs/gui/include/gui/InputTransferToken.h

@@ -39,15 +39,9 @@ struct InputTransferToken : public RefBase, Parcelable {
         return NO_ERROR;
     };
 
+    bool operator==(const InputTransferToken& other) const { return mToken == other.mToken; }
+
     sp<IBinder> mToken;
 };
 
-static inline bool operator==(const sp<InputTransferToken>& token1,
-                              const sp<InputTransferToken>& token2) {
-    if (token1.get() == token2.get()) {
-        return true;
-    }
-    return token1->mToken == token2->mToken;
-}
-
 } // namespace android