[CD Cursor] Switch to using real topology from DM

In this CL we:
1. Remove the hardcoded fake topology and switch to the real topology
   supplied by DM.
2. Fix a small bug in JNI code that translates Java topology objects to
   native.

Test: manual and presubmit
Bug: 362719483
Bug: 367661489
Flag: com.android.input.flags.connected_displays_cursor
Change-Id: I002e3329809e28054eecc6518f1c9bdce57777f2