libbinder: stopProcess: directly stop process

Some threads can fatal abort from this, so go ahead and
stop the process directly. Faster and simpler.

Bug: 388886755
Test: boot
Change-Id: I9fabf092a5199c22ce5952df70c1457e019988a8
diff --git a/libs/binder/IPCThreadState.cpp b/libs/binder/IPCThreadState.cpp
index 612ac09..f191b97 100644
--- a/libs/binder/IPCThreadState.cpp
+++ b/libs/binder/IPCThreadState.cpp
@@ -853,12 +853,8 @@
 
 void IPCThreadState::stopProcess(bool /*immediate*/)
 {
-    //ALOGI("**** STOPPING PROCESS");
-    flushCommands();
-    int fd = mProcess->mDriverFD;
-    mProcess->mDriverFD = -1;
-    close(fd);
-    //kill(getpid(), SIGKILL);
+    ALOGI("IPCThreadState::stopProcess() (deprecated) called. Exiting process.");
+    exit(0);
 }
 
 status_t IPCThreadState::transact(int32_t handle,