Run setenforce 1 on test teardown

Cleanup after test to avoid changing test environment

Fixes: 148917835
Test: SurfaceFlingerTest sffakehwc_test
Change-Id: I5a61401d523302d77c6974befe8ff9844f853c8e
diff --git a/services/surfaceflinger/tests/fakehwc/FakeComposerUtils.cpp b/services/surfaceflinger/tests/fakehwc/FakeComposerUtils.cpp
index 2f89696..96a7541 100644
--- a/services/surfaceflinger/tests/fakehwc/FakeComposerUtils.cpp
+++ b/services/surfaceflinger/tests/fakehwc/FakeComposerUtils.cpp
@@ -183,6 +183,7 @@
     // Wait for mock call signaling teardown?
     property_set("debug.sf.nobootanimation", "0");
     property_set("debug.sf.hwc_service_name", "default");
+    system("setenforce 1");
     ALOGI("Test env tear down - done");
 }