PT-BR: Update translations

Change-Id: I5cc42d1345b5f47a1a1f8b89487623a21d29f407
Move the window background to the activity theme

This has several advantages:

- Reduces overdraw and improves performance especially on weaker and
  older devices

- Centralizes the background attribute out of the layout files

- Shows the proper solid background when the calculator is launching

Change-Id: Id3a4f7499a8bfc50f6b0ff8307d9d420861e0858
Added translation for New Features Part 3

Change-Id: I57842703e49464fa663e3fe2b2d7b1dd97dbc1b3
Merge "Move the window background to the activity theme" into cm-10.1
Merge "Added translation for New Features Part 3" into cm-10.1
Merge "PT-BR: Update translations" into cm-10.1