Revert "IPCThreadState: Add a public method to probe is a hwbinder called is being served."

This reverts commit b178762cf7a93842de56fa0d7a153e0694543821.

Reason for revert: This breaks framework tests and blocks presubmit

Change-Id: I9546c267d14390684f488542e92d7ac64c612488
diff --git a/Android.bp b/Android.bp
index f372618..fee5417 100644
--- a/Android.bp
+++ b/Android.bp
@@ -23,7 +23,6 @@
         "liblog",
         "libcutils",
         "libutils",
-        "libbinderthreadstate",
     ],
     export_shared_lib_headers: [
         "libbase",
@@ -72,7 +71,7 @@
     defaults: [
         "libhwbinder_defaults",
         "hwbinder_pgo",
-        "hwbinder_lto",
+        "hwbinder_lto"
     ],
 }
 
@@ -96,7 +95,6 @@
         enable_profile_use: true,
     },
 }
-
 // Provide lto property to build hwbinder with LTO
 cc_defaults {
     name: "hwbinder_lto",
diff --git a/IPCThreadState.cpp b/IPCThreadState.cpp
index d97ad12..b275a7e 100644
--- a/IPCThreadState.cpp
+++ b/IPCThreadState.cpp
@@ -17,7 +17,6 @@
 #define LOG_TAG "hw-IPCThreadState"
 
 #include <hwbinder/IPCThreadState.h>
-#include <binderthreadstate/IPCThreadStateBase.h>
 
 #include <hwbinder/Binder.h>
 #include <hwbinder/BpHwBinder.h>
@@ -765,7 +764,6 @@
 
     // TODO(b/67742352): remove this variable from the class
     (void)mMyThreadId;
-    mIPCThreadStateBase = IPCThreadStateBase::self();
 }
 
 IPCThreadState::~IPCThreadState()
@@ -1116,9 +1114,6 @@
                 "Not enough command data for brTRANSACTION");
             if (result != NO_ERROR) break;
 
-            // Record the fact that we're in a hwbinder call
-            mIPCThreadStateBase->pushCurrentState(
-                IPCThreadStateBase::CallState::HWBINDER);
             Parcel buffer;
             buffer.ipcSetDataReference(
                 reinterpret_cast<const uint8_t*>(tr.data.ptr.buffer),
@@ -1182,7 +1177,6 @@
                 error = mContextObject->transact(tr.code, buffer, &reply, tr.flags, reply_callback);
             }
 
-            mIPCThreadStateBase->popCurrentState();
             if ((tr.flags & TF_ONE_WAY) == 0) {
                 if (!reply_sent) {
                     // Should have been a reply but there wasn't, so there
@@ -1255,11 +1249,6 @@
     return result;
 }
 
-bool IPCThreadState::isServingCall() const
-{
-    return mIPCThreadStateBase->getCurrentBinderCallState() == IPCThreadStateBase::CallState::HWBINDER;
-}
-
 void IPCThreadState::threadDestructor(void *st)
 {
         IPCThreadState* const self = static_cast<IPCThreadState*>(st);
diff --git a/include/hwbinder/IPCThreadState.h b/include/hwbinder/IPCThreadState.h
index f2112c0..28ae470 100644
--- a/include/hwbinder/IPCThreadState.h
+++ b/include/hwbinder/IPCThreadState.h
@@ -30,9 +30,6 @@
 
 // ---------------------------------------------------------------------------
 namespace android {
-
-class IPCThreadStateBase;
-
 namespace hardware {
 
 class IPCThreadState
@@ -98,32 +95,6 @@
             bool                isLooperThread();
             bool                isOnlyBinderThread();
 
-            // Is this thread currently serving a hwbinder call. This method
-            // returns true if while traversing backwards from the function call
-            // stack for this thread, we encounter a function serving a hwbinder
-            // call before encountering a binder call / hitting the end of the
-            // call stack.
-            // Eg: If thread T1 went through the following call pattern
-            //     1) T1 receives and executes binder call B1.
-            //     2) While handling B1, T1 makes hwbinder call H1.
-            //     3) The handler of H1, calls into T1 with a callback H2.
-            // If isServingCall() is called during B1 before 3), this method
-            // will return false, else true.
-            //
-            //  ----
-            // | H2 | ---> While callback H2 is being handled during 3).
-            //  ----
-            // | B1 | ---> While B1 is being handled, hwbinder call H1 made.
-            //  ----
-            // Fig: Thread Call stack while handling H2.
-            //
-            // This is since after 3), while traversing the thread call stack,
-            // we hit a hwbinder call before a binder call / end of stack.
-            // This method may be typically used to determine whether to use
-            // hardware::IPCThreadState methods or IPCThreadState methods to
-            // infer information about thread state.
-            bool isServingCall() const;
-
             // Tasks which are done on the binder thread after the thread returns to the
             // threadpool.
             void addPostCommandTask(const std::function<void(void)>& task);
@@ -173,7 +144,6 @@
             bool mIsPollingThread;
 
             std::vector<std::function<void(void)>> mPostCommandTasks;
-            IPCThreadStateBase *mIPCThreadStateBase;
 };
 
 }; // namespace hardware