Regenerate action icons with trim, so they are big enough.

Now they actually have the inner area size as specified here:
http://iconhandbook.co.uk/reference/chart/android/
which is based on this:
http://developer.android.com/design/style/iconography.html

Generated with:
http://romannurik.github.io/AndroidAssetStudio/icons-actionbar.html#source.type=clipart&source.space.trim=1&source.space.pad=0&source.clipart=res%2Fclipart%2Ficons%2Faction_favorite.svg&name=ic_action_favorite&theme=custom&color=000%2C100
and
http://romannurik.github.io/AndroidAssetStudio/icons-actionbar.html#source.type=clipart&source.space.trim=1&source.space.pad=0&source.clipart=res%2Fclipart%2Ficons%2Faction_help.svg&name=ic_action_help&theme=custom&color=000%2C100
and
http://romannurik.github.io/AndroidAssetStudio/icons-actionbar.html#source.type=clipart&source.space.trim=1&source.space.pad=0&source.clipart=res%2Fclipart%2Ficons%2Fcontent_undo.svg&name=ic_action_undo&theme=custom&color=000%2C100