[display] Remove ddk calls from on_displays_changed

This change replaces get_info with per-display argument structs to
on_displays_changed, and it moves the display mode validation to a
posted task. This allow simpler locking in the impl drivers, and it
enables the addition of output parameters into the argument structs.

This change also causes ownership messages to be sent before display
changed messages. Update various clients to not rely on a particular
order of messages.

Test: Boot to virtcon/hotplug on NUC/vim/eve. Run gfxtest, gfxlatency,
and display-test

Change-Id: Id561ed7587037353c1aeeab96511481d74026bdc

[intel-i915] Separate ddis from pipes/transcoders

This change creates a standalone Pipe class which manages hardware
pipes and transcoders, which leaves displays to only manage ddis. This
allows more dynamic configuration of the hardware.

Test: Virtcon and hotplugging on skl NUC/kbl NUC/eve/acer, virtcon
switching, boot menu, display-test, vkcube on skl NUC.

Change-Id: I845ec143b14866099f7b17840dfe24492f6e5909

[display] Add display mode validation

Test: display-test on NUC and eve
Change-Id: Ic5f35bbd73b3d860d330cc94102009ab9ba8b45c

[intel-i915] Support layer scaling

Test: display-test
Change-Id: I6c6b9835d91e95d7911b1b47a20eaf21ec13ec2a

[display] Add support for color layers

Test: display-test
Change-Id: I270351824d264e5c905a74b43a2c09079059bd94

[display] Implement new vsync API

This change adds a new vsync event to the display controller API removes
the present signal event. It also changes the behavior of the cursor
position API to clamp the cursor to the display, to sidestep the issue
of how vsync interacts with a cursor that isn't on the display.

Test: display-test, vkcube, vkcube_image_pipe_swapchain
Change-Id: I6f332e3709eef2c6e1c932581024c2149b65a2a1

[display] Add layer alpha API

Test: manually run display-test
Change-Id: I8d6791f5ad286d54bca130e0d156010e61c3539d

[display] Add support for color space conversion

Test: manually run display-test
Change-Id: I81e2bcec9d7b800b572b8f579aa6eb8b57792894

[display-test] Add test for hardware cursor

Test: Manually run display-test
Change-Id: I21b1b5e63e67474c1e6ab04be01b64b76b0aaf7b

[syscalls] Remove read_status from zx_channel_call

This parameter no longer has a purpose. Also, remove ZX_ERR_CALL_FAILED.
This status code no longer has a purpose.

Test: No behavior change
Change-Id: I71945ea9d1d6d591a20476106df1e598dfaf97b1

[display-test] Add test for layer rotation

This change also uses Y legacy tiling on x64 platforms, since linear
planes cannot be rotated.

Test: self
Change-Id: I51940203a9a856cbd5e540aafe03bf21207044f0

[display][intel-i915] Add support for modesetting

Change-Id: I6a2a8a5ecae1514ae87ee2fb4c6511578d376fa4

[display-test] Add tests for layers

Test: self
Change-Id: I11224c7ce7ada9913dfb7b28184215d66ebb3ba7

[display] Add support for layers to core driver

Change-Id: I20f632c2921e00157d2c2278ce8a2e023aa5d5a9

[display] Move the display fidl library into the fuchsia namespace

Change-Id: I92d1e27f8341291292e1969f62d87f457ae76ddc

[display] Use uint64_t for ids

Change-Id: I8538e3e53978045bc55a8d4116acf90393dbfdf8

[display] Switch from callback to fidl events

Change-Id: I6d179a38019fb8fd6d85806e5487b2231234a6b3

[uapp] Add app to test new display APIs

Change-Id: Ie967c97fb4693c002b8dfaf0de660b5f44c4f68a