The android test launcher now silently waits for a debugger

There seems to be no good reason to use the non-silent WaitForDebugger(),
and the silent one is much easier to continue from in gdb, so now the
android native test launcher silently waits too.

BUG=643818

Review-Url: https://codereview.chromium.org/2306213002
Cr-Commit-Position: refs/heads/master@{#416373}

testing/android/native_test/native_test_launcher.cc

@@ -125,7 +125,7 @@ static void RunTests(JNIEnv* env,
     AndroidLog(ANDROID_LOG_VERBOSE,
                "Native test waiting for GDB because flag %s was supplied",
                switches::kWaitForDebugger);
-    base::debug::WaitForDebugger(24 * 60 * 60, false);
+    base::debug::WaitForDebugger(24 * 60 * 60, true);
   }
 
   base::FilePath test_data_dir(