Fix formatting in PerformUnifiedRestoreTask{,Test}

I've formatted these files with `google-java-format --aosp` before
making further changes. All checkstyle errors and parameter comment
style have also been fixed.

Bug: 291249666
Test: atest PerformUnifiedRestoreTaskTest
Change-Id: Ia3e7751d7477e067aa6956dffc9819690adba1e2