Use TYPE_PRIVATE_PRESENTATION for private presentations

Detect if the Presenation is targeting a private virtual display, and if they
are use the windowType TYPE_PRIVATE_PRESENTATION.

Bug: 152652348
Bug: 141745510
Test: atest CtsWindowManagerDeviceTestCases:PresentationTest
Test: atest CtsDisplayTestCases:android.display.cts.VirtualDisplayTest
Change-Id: I58834636e092f992e403342e36b475dc60e8f20a