Fix #2210: Fix inputs not being easily visible

[domdomegg]

Description

Fixes #2210

What changes did you make and why?

• Moved the theme-ing for the search bar into its own theme so it does not affect inputs in SettingsFragment

Tests performed

Tested 2.9.0-debug-fix-2210~a220c58af on Galaxy Nexus (emulator) with API level 28

Settings fixed	Search still looks right

[codecov-io]

Codecov Report

Merging #2211 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master   #2211   +/-   ##
======================================
  Coverage    5.87%   5.87%           
======================================
  Files         231     231           
  Lines       11587   11587           
  Branches     1078    1078           
======================================
  Hits          681     681           
  Misses      10849   10849           
  Partials       57      57

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[maskaravivek]

Thanks for the fix @domdomegg. It works for me. :)