Revert "Try to ensure tests run sequentially"

Revert submission 13593269

Reason for revert: Bug: 180689674
Reverted Changes:
I59f6e607f:Update RemovalClient to support new biometric AIDL...
I3fdb3fe0b:Try to ensure tests run sequentially

Change-Id: Ia9c02759db7238536e21dd05f8e247a91e9ac5aa
(cherry picked from commit c0dd229fc6afb78c18b6688f7b5034f6229b222d)
29 files changed