Launch SizeCompat Activities in a Window on Freeform Desktop Mode

Currently, when a display is in freeform mode, an activity that
is not resizable launches in fullscreen. However, for large
screen devices, it is preferable to launch activities in windows
to create the true desktop experience. This CL changes launch
configurations and resize actions to make non-resizable activities
launch in a window and to prevent resizing of these windows. When
the display enters fullscreen mode, the activity keeps its original
bounds and launches in a letterbox.

To make this all work, ActivityRecord was updated to use the
hierarchy instead of trying to recalculate everything independently
with a fullscreen assumption. The result is that the ActivityRecord
configuration now (mostly) has the actual bounds of the app so
that positioning works properly.

Please note, the following tests were removed because the
functionality they were trying to test has changed. Previously,
when a task was nonresizeable, even if the display windowing mode
was freeform, it was launched in fullscreen mode. However this CL
allows nonresizeable tasks in freeform mode to be launched in
windows. These tests were removed since they are redundant
with non-resizable (which is handled by packagemanager):
- TaskLaunchParamsModifierTests#testForceMaximizesPreDApp
- TaskLaunchParamsModifierTests#testForceMaximizesAppWithoutMultipleDensitySupport

The following tests were added:
- TaskPositioningControllerTests#testHandleTapOutsideNonResizableTask
- TaskLaunchParamsModifierTests#testLaunchesAppInWindowOnFreeformDisplay
- ActivityRecordTests#testSizeCompatMode_KeepBoundsWhenChangingFromFreeformToFullscreen

This also adds a developer option to enable size-compat
apps to start in freeform mode.

Test: go/wm-smoke
Change-Id: I3aa3fcdcd2b1e0b875d61dfaed3d5e85313edc29