SystemUI: implement better partial screenshot

Author: Demon000 <demonsingur@gmail.com>
Date:   Mon Jan 20 03:37:29 2020 +0000

    ScreenshotHelper: ignore timeout when taking partial screenshots

    User should have as much time to select the region as he wants.

    Change-Id: Ib9b79d5127a59d3e2af278dbc8cd054221c37ca6

Author: ezio84 <brabus84@gmail.com>
Date:   Sun Dec 1 18:19:48 2019 +0100

    SystemUI: block gestural navigation when using partial screenshot

    Change-Id: I68d25a6eab9ea16707e8736b9e56055532bcdf87

Author: Demon000 <demonsingur@gmail.com>
Date:   Sat Feb 1 18:24:34 2020 +0000

    GlobalScreenshot: do not capture multiple screenshots simultaneously

    Change-Id: I4c0c73759b8b0483f0d28b4c6c39e9a616c26b57

Author: Demon000 <demonsingur@gmail.com>
Date:   Thu Apr 9 22:59:06 2020 +0200

    ScreenshotSelector: handle rotation issues

    Disable rotation while the screenshot selector is visible,
    because it cannot handle rotation internally,
    and rotating while a certain selection is made might cause
    the selection to go off-screen.

    Also, adjust the crop coordinates so that they function properly.
    The native screenshot taking functions expect the coordinates
    to be in a physical left-to-right, top-to-bottom order, which
    is not the case for 90 degree rotation, where the top is
    actually the right physical edge, or for 270 degree rotation,
    where the right is actually the top physical edge, or for
    180 degrees, where both axes are flipped.

    https://gitlab.com/LineageOS/issues/android/-/issues/1749

    Change-Id: I18da90592cf7baa46547554df954bdb071961311

Change-Id: I21936e96a5d3d89b2487beeec659ec360584d114