fix: updated multimeter screen layout to make it visible properly

[AsCress]

Fixes #2342 and #2394
This issue was arising due to a redundant View bottom_view being present in the layouts, something which has already been implemented in activity_multimeter_main.xml.

Changes

• app/src/main/res/layout-hdpi/activity_multimeter.xml,
  app/src/main/res/layout-sw600dp/activity_multimeter.xml,
  app/src/main/res/layout-xhdpi/activity_multimeter.xml,
  app/src/main/res/layout/activity_multimeter.xml - Removed bottom_view and fixed some other constraints, hardcoding.
• app/src/main/res/values-hdpi/dimens.xml,
  app/src/main/res/values/dimens.xml - Fixed some dimensions and added others to improve the layouts.

Screenshots / Recordings

• app/src/main/res/layout-xhdpi/activity_multimeter.xml:-
  
• app/src/main/res/layout-hdpi/activity_multimeter.xml:-
  
• app/src/main/res/layout-sw600dp/activity_multimeter.xml:-
  

Checklist:

• No hard coding: I have used resources from strings.xml, dimens.xml and colors.xml without hard coding any value.
• No end of file edits: No modifications done at end of resource files strings.xml, dimens.xml or colors.xml.
• Code reformatting: I have reformatted code and fixed indentation in every file included in this pull request.
• No extra space: My code does not contain any extra lines or extra spaces than the ones that are necessary.