set screen density for aarch64 model

Set the screen density to 120 to get plain tablet UI.

We can now pass couple of CTS tests which were failing
because of screen feature tests, plus we also get
on-screen menu buttons visible now.

Change-Id: I42d1aff933d279bba4a4e874abfa3629464e1cc3
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
1 file changed