Merging ub-launcher3-qt-r1-dev, build 5662440

Test: Manual

Bug:132784008 P4 Dark mode preview is not shown until activity restarts.
Bug:132812918 P2 Rendering jank when wallpaper picker loads
Bug:64712476 P3 Import translations for dev branches
Change-Id: I6b410239615ef55b934e3fed4f31d3a0f54b6d7a