Fix return condition in getWorkspacePageTranslationProvider

- When EDIT_MODE was introduced, it added a wrong condition to make it always return DEFAULT_PAGE_TRANSLATION_PROVIDER

Bug: 294228521
Test: manual
(cherry picked from commit c325c686)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:4bfc0ee720e4ee80035c7ef59cf2d8d095cf9d72)
Merged-In: If970949c8ab55bc67f98f987a7654ec2db89cdfb
Change-Id: If970949c8ab55bc67f98f987a7654ec2db89cdfb