Rename libdebuggerd_client to libdebuggerd_handler.

Bug: http://b/30705528
Test: debuggerd_test
Change-Id: I625a9a2e7304d172873ba9344b74efa57ad7bdad
diff --git a/tests/gtest_preinit_debuggerd.cpp b/tests/gtest_preinit_debuggerd.cpp
index aac2e3f..88ca63b 100644
--- a/tests/gtest_preinit_debuggerd.cpp
+++ b/tests/gtest_preinit_debuggerd.cpp
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#include "debuggerd/client.h"
+#include "debuggerd/handler.h"
 
 void __gtest_preinit() {
   debuggerd_init(nullptr);