Change the bootanim time file location.

This change moves the bootanim time file location from
/data/bootanim/time to /data/misc/bootanim/time. This is to address the
recommendation in b/232299581#comment8.

Bug: 210757252
Test: Boot animation can show time. No SELinux violations.
Change-Id: I8fcf9943911f6f3f0af4d6c3ae391c5805bf7885