Put Atest in local mode

Test: presubmit
Bug: 282031140
Change-Id: I0461c13264dbf88318bb19bff58c078bd09b47cb
diff --git a/atest/atest_tradefed.sh b/atest/atest_tradefed.sh
index a3d23e3..ba61a99 100755
--- a/atest/atest_tradefed.sh
+++ b/atest/atest_tradefed.sh
@@ -72,7 +72,7 @@
 fi
 
 # Note: must leave $RDBG_FLAG and $TRADEFED_OPTS unquoted so that they go away when unset
-START_FEATURE_SERVER=1 ${TF_JAVA} $RDBG_FLAG \
+LOCAL_MODE=1 START_FEATURE_SERVER=1 ${TF_JAVA} $RDBG_FLAG \
     -XX:+HeapDumpOnOutOfMemoryError \
     -XX:-OmitStackTraceInFastThrow \
     $TRADEFED_OPTS \