[8/n] Fix failing unit tests after introducing tiling

Some unit tests are no longer compiling due to API changes around
tiling and DragResizeWindowGeometry and other tests were failing due to
the tiling bounds changing to accommodate for the divider bounds by being
slightly smaller.

Those were fixed by just flipping the flag for the Tiling feature

Flag: com.android.window.flags.enable_tile_resizing
Test: atest <FailingTestFile>
Bug: 29581729
Change-Id: I8c7eada036dbfb5741a77cced0e7d4cd1b786845