Remove UpdatableSystemFontTest modules from sandboxing denylist

These modules actually work fine with sandboxing, they were just added
to the list because they have non-deterministic outputs, which caused
the genrule sandboxing script to think that sandboxing affected their
outputs.

Bug: 307824623
Test: ./build/soong/tests/genrule_sandbox_test.py UpdatableSystemFontTest_NotoColorEmojiV0.sig UpdatableSystemFontTest_NotoColorEmojiV0.ttf UpdatableSystemFontTest_NotoColorEmojiVPlus1.sig UpdatableSystemFontTest_NotoColorEmojiVPlus1.ttf UpdatableSystemFontTest_NotoColorEmojiVPlus2.sig UpdatableSystemFontTest_NotoColorEmojiVPlus2.ttf with aosp/2816385
Change-Id: I07b1df779c8d47ad875a4fc2d3af5e46945cff83