Fixes changing the font scale of a background user should not affect UI

It also fixes the same issue with the font weight.

Bug: 190043007
Test: atest MultiUserTests
Change-Id: I90c5a7f74613b6032f501c8b53ad79025f09a211
diff --git a/tests/MultiUser/TEST_MAPPING b/tests/MultiUser/TEST_MAPPING
new file mode 100644
index 0000000..0dbef6c
--- /dev/null
+++ b/tests/MultiUser/TEST_MAPPING
@@ -0,0 +1,7 @@
+{
+  "presubmit": [
+    {
+      "name": "MultiUserTests"
+    }
+  ]
+}