Tidy DisplayManager dumpsys

- Remove mentions of dpc2
- change abc prints to ipw, so that everything is aligned correctly
- add separators to dumpsys, so that its clearer to scroll through and
  read.
- reorder dumpsys, so that more frequently used things appear first

Bug: 363990247
Flag: EXEMPT trivial fix
Test: adb shell dumpsys display

Change-Id: If70afeafe54703367b94f07dda27cce242b153a3