Move UpdatableSystemFontTest to presubmit.

Bug: 180370699
Test: atest --test-mapping frameworks/base/services/core/java/com/android/server/graphics/fonts --dry-run
Test: atest --test-mapping frameworks/base/tests/UpdatableSystemFontTest --dry-run
Change-Id: I084c641eeb52b2b9e63251ae1e21f5ceb192803a
diff --git a/tests/UpdatableSystemFontTest/TEST_MAPPING b/tests/UpdatableSystemFontTest/TEST_MAPPING
index a5c4479..7fbf426 100644
--- a/tests/UpdatableSystemFontTest/TEST_MAPPING
+++ b/tests/UpdatableSystemFontTest/TEST_MAPPING
@@ -1,5 +1,5 @@
 {
-  "postsubmit": [
+  "presubmit": [
     {
       "name": "UpdatableSystemFontTest"
     }