Add a missing test dependency for UpdatableSystemFontTest

In Android.bp, all dependencies of a test should be declared explicitly, so that test infrastructure could only provide the needed dependencies instead of all to run a test. This change adds the missing dependency that is used in test config file but not declared in Android.bp.

Bug: 222438068
Test: atest-src UpdatableSystemFontTest \
          --experimental-device-driven-test \
          --experimental-java-runtime-dependencies \
          --bazel-arg=--test_timeout=48000
Test: atest UpdatableSystemFontTest
Merged-In: Ic1b5b94aabd4c95744109f2cc7443ae04c43b3a6
Change-Id: Ie23b74f37af3019e50753e2169752abadbf3e0fa