ClatdController - also attach 'clsact' qdisc to v4-* interface

Note that cleanup is already partially handled by init's resetEgressMap()

Test: compiles, atest, flashed to phone on wifi/cellular ipv6 only
      network and observed dumpsys netd printout and interface tc state
Bug: 139396664
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I1a90da16f1751c354e01d1b7706255ecde24996a