Resume-on-Reboot: use uevent to chown

We now allow this device to change names to accomodate other board
types that use pmem. Setting this in the HAL .rc file now causes
SELinux errors on those platforms.

Switch to using the ueventd.rc method to avoid this SELinux problem.

Bug: 63928581
Bug: 146400078
Test: atest VtsHalRebootEscrowTargetTest
Change-Id: If5b83c087810f52fef4039748e9015a5f95f2f2a