Disable emoji compat initializer

- Disable the default-enabled emoji compat initializer until the
  threading issues are resolved

Bug: 278897602
Bug: 278337171
Test: Presubmit
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:8e3d5a1096c1e089881973e6bf3d87ccc91803cb)
Merged-In: Ie5c6e8dbc69001478af78923b02bcca7777ed6b1
Change-Id: Ie5c6e8dbc69001478af78923b02bcca7777ed6b1