Group strings and remove unused resources

briar-android/res/menu/blogs_write_blog_post_actions.xml

briar-android/res/values-de/strings.xml

briar-android/res/values-ms/strings.xml

briar-android/res/values-pt-rBR/strings.xml

briar-android/res/values/color.xml

briar-android/res/values/dimens.xml

briar-android/res/values/strings.xml

...d/src/org/briarproject/android/BriarFragmentActivity.java

...ndroid/src/org/briarproject/android/PasswordActivity.java

...roid/src/org/briarproject/android/blogs/BlogFragment.java

...org/briarproject/android/blogs/RssFeedImportActivity.java

...src/org/briarproject/android/forum/ForumListFragment.java