Reland ""CastDetailsView: Create CastDetailsViewModel and CastDetailsViewContent"

The original CL was reverted (b/403313655) due to a conflict with another
CL (ag/31943060). See the diff between PS1 vs PS2 for the reland fix.

Bug: 378514236
Flag: com.android.systemui.qs_tile_detailed_view
Test: CastTileTest
Test: Click on cast tile in the QS -> go into details view instead of
showing the dialog.

Change-Id: I7da552819ed6528e89e4495833781ae3eb569230