Settings: Fix devloper options FC and remove all bug report options

This change: https://gerrit.slimroms.net/#/c/18820/

removed it just in the xml which is a pretty bad idea if java code
still assumes it is there.

Due that we will never need it we remove the code completely.

As well remove bug report in power menu option.

Change-Id: I234dee3a19639f89b5a7b5295ca408142e4223dc
Settings: Remove all system update settings for google OTA

not needed and confuses the user

Change-Id: I49abf0e6418c7b51aba6d3172c39f209d288382e
Settings: add back button in actionbar on Status settings

for more consistence. We add it as drawable due that we still have 3 other
places in settings where it is missing.

We will change later....after that we should have worked every inconsistence out.

Change-Id: If21d03b04d2356fa78349baa8ff2fb3b008dacbf