external/messageformat is unused in the platform Bug: 63809499 Test: build Merged-In: If26b67f868ae1377efccf49c1b6bf086d4b43415 Merged-In: I478fa7791328539bdd8826cdec1dc9f36f8cbfdc Change-Id: I478fa7791328539bdd8826cdec1dc9f36f8cbfdc