[Assist Structure] Make assist structure dump easier to read

Currently in assist structure dump, the "No Credential Manager Request"
line is missing one indent, making the dumped assist structure a bit
hard to read.

This change reformatted the "No Credential Manager Request" line to be
consistent format with "Autofill info", making reading the dump eaiser.

Before: https://paste.googleplex.com/5976725927755776#l=9
After the chanage: https://paste.googleplex.com/4901063213187072#l=116

Bug: b/331667322
Test: N/A change only in dump msg
Change-Id: Id7f0ef79c7964086d0c4b5b3934e57b865a367c6