Set corner radius for a drag move indicator

This CL includes the following changes:
- Pass the context associated with a display where the indicator is in
  to the indicator to get the correct corner radius value
- Remove the unneeded Context from the argument of the constructor of
  the factory

Bug: 395554213
Test: manual - go/cd-smoke
Test: WMShellUnitTests
Flag: com.android.window.flags.enable_connected_displays_window_drag
Change-Id: I46354de0a2049fca11863f320da80c3b2392f640