Fix NotificaitonPanelView x-axis shift with IME

IME will trigger the fitSystemWindow. And, there is a difference of
the parameter insets between IME and no IME. The insets.right and
insets.left report 0 without IME but positive number with IME
because IME is a type of system window and trigger fitSystemWindow
and then take the cutout as part of system window.

StatusBarWindowView handle the following condition
cutout > 0 && cutout == systemWindowInset and make its children not
layout on the safe inset both of cut out and system window. In order
to handle that cut out become system window, to take the maximum of
cut out and system window to make sure that the safe inset is
decided in StatusBarWindowView and its view decent only care about
the corner cut out.

Because StatusBarWindowView make both of PhoneStatusBarView's parent
and NotificationPanelView to have the margin for both of cutout and
system window, the counting of the padding and panel translation of
the HeadsUpStatusBarView need to do the relative changes.

Change-Id: Iafdc6a85e0e7d360b1bfc1e820f6e0779c32753f
Fix: 79957419
Fix: 109945733
Fix: 109865908
Test: atest SystemUITests