Improved English translations

Change-Id: I1250012ec305469dbf002c3cb01b5d3031eda38f
Derp in strings.xml

Change-Id: I99a1bdb1603a77d70af0ee190c6a0d2bea2dcd88
Permission manager: Derp

Change-Id: Icdd4bdcf9eede0ec4969bca3ee018975d3b00b33