Review Mozilla 1947494: Initializing BrowserStore requires inflating drawables and converting them to bitmaps

🔍 Bugzilla Audit

Bugzilla: https://bugzilla.mozilla.org/show_bug.cgi?id=1947494

Description

The changes made in this bug moved applicationSearchEngines from Core.kt to mobile/android/fenix/app/src/main/java/org/mozilla/fenix/components/search/ApplicationSearchMiddleware.kt.

The mvoe is non-trivial so it was not done in the 138 rebase where the move happened. This ticket is for making the move.

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