Use libbinderthreadstateutils.

Clients needing to differentiate between system/vendor used to be able
to use isServingCall. However, this was expensive to implement. This
alternative approach instead requires users of this API to use
libbinderthreadstateutils which does a slighty different operation.

Bug: 148692216
Test: boot
Change-Id: I2c926107e43a47bd4e20e08f16a293e707ab03f7
Merged-In: I2c926107e43a47bd4e20e08f16a293e707ab03f7

core/jni/Android.bp

@@ -233,6 +233,7 @@ cc_library_shared {
 
     static_libs: [
         "libasync_safe",
+        "libbinderthreadstateutils",
         "libdmabufinfo",
         "libgif",
         "libseccomp_policy",

core/jni/android_util_Binder.cpp

@@ -37,6 +37,7 @@
 #include <binder/Parcel.h>
 #include <binder/ProcessState.h>
 #include <binder/Stability.h>
+#include <binderthreadstate/CallerUtils.h>
 #include <cutils/atomic.h>
 #include <log/log.h>
 #include <utils/KeyedVector.h>
@@ -946,7 +947,7 @@ static jint android_os_Binder_getCallingUid()
 
 static jboolean android_os_Binder_isHandlingTransaction()
 {
-    return IPCThreadState::self()->isServingCall();
+    return getCurrentServingCall() == BinderCallType::BINDER;
 }
 
 static jlong android_os_Binder_clearCallingIdentity()