Initial support for camera cutout in CollapsedStatusBar

- Display a space view exactly covering where the display cutout is

- Custom layout for system_icons because this view needs to now layout
right-to-left, and hide icons that don't fit. Similar to notification
icon container but in the other direction. Still needs dots and to limit
the # of icons

- When in landscape/seascape, the cutout space disappears and instead
the status bar insets itself by the same amount that the window is
letterboxed

- Moved battery percent back to the right of the battery because the
time is no longer on that side

Test: adb shell cmd overlay enable
com.android.internal.display.cutout.emulation && adb shell stop && adb
shell start # to start emulation
Bug: 63772836

Change-Id: I8071bfb4983a9d9306df1487cdac956494e80c28