init: update recovery when enabled in settings

Update the recovery image only if the option is enabled
under Developer options

This reverts commit 231e0a9e6a1da6fa4a188840f68af649669e417f.

Change-Id: I928f7ee8bb3eaf5581bb8225661d253ecca0c4ef
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_system_core into cm-11.0