Add Themes category

Under Personal category

Change-Id: I0eb669956d9e89bb92cd43487b14b4246454a400
Signed-off-by: ayysir <dresadd09691@gmail.com>

Conflicts:
	res/values/strings.xml
	res/xml/settings_headers.xml

(cherry picked from commit 84ef8f614a5c35c0fdb13de0c9c54a1674a8e719)

Conflicts:
	res/values/strings.xml

(cherry picked from commit f64753e43655753147cb3d8ebf09c353134a1dbd)