Fix bad exclude region in landscape

Update DisplayContent.mBaseDisplayRect when device orientation is
changed, it avoids to set incorrect initial value of
mTouchExcludeRegion, that will cause result of calculated
mTouchExcludeRegion becomes an incorrect strange region on
landscape orientation.

Change-Id: I993864653edc2852f91abed7891e6631b4bae15a
Signed-off-by: tingna_sung <tingna_sung@htc.com>