Add TaskRunner to manage the thread for Bs*.

Bug: 31819198 (partly fixes it)

Test: libhidl-test (repeated 1000 times)
Test: hidl_test

Change-Id: Ia68adbab9dd40c09dfd2861ae03f65028d4694c7
diff --git a/Android.bp b/Android.bp
index f9fbe10..9bc0b26 100644
--- a/Android.bp
+++ b/Android.bp
@@ -41,6 +41,7 @@
         "IServiceManager.cpp",
         "Static.cpp",
         "Status.cpp",
+        "TaskRunner.cpp",
     ],
 
     product_variables: {