ArmVirtPkg/ArmVirtQemu: use MdeModulePkg/BDS

ArmVirtPkg/ArmVirtQemu: use MdeModulePkg/BDS

Based on OvmfPkg commit 79c098b6d25d.

Unlike in OVMF, no USE_OLD_BDS fallback is introduced; I think that
ArmVirtPkg is less widely used by non-developers than OvmfPkg.

ArmVirtXen is not modified, as it uses PlatformIntelBdsLib from
ArmPlatformPkg.

About this patch:

- DxeServicesLib and SortLib are resolved generally (they have broad
  client module type lists).

- ReportStatusCodeLib is resolved for UEFI_APPLICATION modules.

- GenericBdsLib and PlatformBdsLib are replaced with UefiBootManagerLib
  and PlatformBootManagerLib, and resolved from under MdeModulePkg and
  ArmVirtPkg, respectively.

- QemuBootOrderLib is pointed to the QemuNewBootOrderLib instance.

- FileExplorerLib no longer depends on SECURE_BOOT_ENABLE, it is nedeed by
  BootMaintenanceManagerUiLib, which we link into UiApp.

- PcdBootManagerMenuFile carries the FILE_GUID of
  "MdeModulePkg/Application/UiApp/UiApp.inf". The default PCD value from
  "MdeModulePkg/MdeModulePkg.dec" points to
  "MdeModulePkg/Application/BootManagerMenuApp/BootManagerMenuApp.inf",
  which, according to the commit that introduced it (a382952f8255), only
  'provides a very simple UI showing all the boot options recorded by
  "BootOrder" and user can select any of them to boot'.

- Include the new core BDS driver, and include the boot manager
  application, with the usual main menu entries.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Fixes: https://github.com/tianocore/edk2/issues/83
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Ruiyu Ni <ruiyu.ni@Intel.com>