Fix flag bug id.

1. The b/ prefix prevents the gantry configuration from progressing.
2. b/323414215 is the parent bug for all of this work, so we should use
that.

Bug: 323414215
Test: Flags only change
Change-Id: Ic87341a69b2e6f79b6ded6e8450ecd2e8d2b8e72
1 file changed