Add an option to change the device hostname

This adds an option to modify the device hostname used
in ip resolution. This is useful when connecting to the
android device in a dynamic dhcp environment.

The framework/base part is already present.

PS2: move preference above the debugging section

Change-Id: Ibc145b74036617248d4f33c6866cc9c8a8cc8974
Merge "Add an option to change the device hostname" into jb-mr1
Updated Japanese translation

Added device_hostname entry

Change-Id: I97ae8ad5a57608734ebe3b711d1a0d076e5da46e
Signed-off-by: rdgate <rdgate@gmail.com>
Merge remote-tracking branch 'aokp/jb-mr1' into jb-mr1