Revert "Placeholder for binder freeze notification API."

This reverts commit 4a5441f.

Reason for revert: b/351718767

Change-Id: Ic8a6828b72f44746ec925e829748ad53e9050f57

Author: Yu-Ting Tseng

libs/binder/Binder.cpp

@@ -441,14 +441,6 @@ status_t BBinder::unlinkToDeath(
     return INVALID_OPERATION;
 }
 
-status_t BBinder::addFrozenStateChangeCallback(const wp<FrozenStateChangeCallback>&) {
-    return INVALID_OPERATION;
-}
-
-status_t BBinder::removeFrozenStateChangeCallback(const wp<FrozenStateChangeCallback>&) {
-    return INVALID_OPERATION;
-}
-
 status_t BBinder::dump(int /*fd*/, const Vector<String16>& /*args*/)
 {
     return NO_ERROR;

libs/binder/BpBinder.cpp

@@ -557,14 +557,6 @@ void BpBinder::sendObituary()
     }
 }
 
-status_t BpBinder::addFrozenStateChangeCallback(const wp<FrozenStateChangeCallback>&) {
-    return INVALID_OPERATION;
-}
-
-status_t BpBinder::removeFrozenStateChangeCallback(const wp<FrozenStateChangeCallback>&) {
-    return INVALID_OPERATION;
-}
-
 void BpBinder::reportOneDeath(const Obituary& obit)
 {
     sp<DeathRecipient> recipient = obit.recipient.promote();

libs/binder/include/binder/Binder.h

@@ -50,13 +50,6 @@ class BBinder : public IBinder {
                                                       void* cookie = nullptr, uint32_t flags = 0,
                                                       wp<DeathRecipient>* outRecipient = nullptr);
 
-    // Placeholders to test if adding virtual functions here breaks things.
-    // Will be replaced by an actual API once things are verified to work.
-    LIBBINDER_EXPORTED virtual status_t addFrozenStateChangeCallback(
-            const wp<FrozenStateChangeCallback>& callback);
-    LIBBINDER_EXPORTED virtual status_t removeFrozenStateChangeCallback(
-            const wp<FrozenStateChangeCallback>& callback);
-
     LIBBINDER_EXPORTED virtual void* attachObject(const void* objectID, void* object,
                                                   void* cleanupCookie,
                                                   object_cleanup_func func) final;

libs/binder/include/binder/BpBinder.h

@@ -66,12 +66,6 @@ class BpBinder : public IBinder {
                                                       void* cookie = nullptr, uint32_t flags = 0,
                                                       wp<DeathRecipient>* outRecipient = nullptr);
 
-    [[nodiscard]] virtual status_t addFrozenStateChangeCallback(
-            const wp<FrozenStateChangeCallback>& recipient);
-
-    [[nodiscard]] virtual status_t removeFrozenStateChangeCallback(
-            const wp<FrozenStateChangeCallback>& recipient);
-
     LIBBINDER_EXPORTED virtual void* attachObject(const void* objectID, void* object,
                                                   void* cleanupCookie,
                                                   object_cleanup_func func) final;

libs/binder/include/binder/IBinder.h

@@ -198,14 +198,9 @@ class [[clang::lto_visibility_public]] LIBBINDER_EXPORTED IBinder : public virtu
         virtual void binderDied(const wp<IBinder>& who) = 0;
     };
 
-    class FrozenStateChangeCallback : public virtual RefBase {
-    public:
-        virtual void onStateChanged(const wp<IBinder>& who, bool isFrozen) = 0;
-    };
-
-#if defined(__clang__)
-#pragma clang diagnostic pop
-#endif
+    #if defined(__clang__)
+    #pragma clang diagnostic pop
+    #endif
 
     /**
      * Register the @a recipient for a notification if this binder
@@ -254,12 +249,6 @@ class [[clang::lto_visibility_public]] LIBBINDER_EXPORTED IBinder : public virtu
                                             uint32_t flags = 0,
                                             wp<DeathRecipient>* outRecipient = nullptr) = 0;
 
-    // Placeholders. See Binder.h for details.
-    [[nodiscard]] virtual status_t addFrozenStateChangeCallback(
-            const wp<FrozenStateChangeCallback>& callback) = 0;
-    [[nodiscard]] virtual status_t removeFrozenStateChangeCallback(
-            const wp<FrozenStateChangeCallback>& callback) = 0;
-
     virtual bool            checkSubclass(const void* subclassID) const;
 
     typedef void (*object_cleanup_func)(const void* id, void* obj, void* cleanupCookie);