base: process: Abort setting the process group if one of the threads fails to switch

Signed-off-by: San Mehat <san@google.com>

core/jni/android_util_Process.cpp

@@ -266,6 +266,7 @@ void android_os_Process_setProcessGroup(JNIEnv* env, jobject clazz, int pid, jin
         if (set_sched_policy(t_pid, (grp == ANDROID_TGROUP_BG_NONINTERACT) ?
                                             SP_BACKGROUND : SP_FOREGROUND)) {
             signalExceptionForGroupError(env, clazz, errno);
+            break;
         }
     }
     closedir(d);