Add DuckDuckGo search engine for en-gb locale (both regional and region agnostic version)

Change-Id: Ia837b2085e3fc16b608ee68f558460443a065384
Browser: Update Polish language

Change-Id: I478d8381fd8acd0f1ba3ce3c55987bc2bb6e285a
Merge "Add DuckDuckGo search engine for en-gb locale (both regional and region agnostic version)" into cm-10.1
Merge branch 'cm-10.1' of https://github.com/CyanogenMod/android_packages_apps_Browser into DJL10.1