Revert "Parallel Module Loading: Add conservative mode"

Revert submission 3556468

Reason for revert: stability issue

Reverted changes: /q/submissionid:3556468

Bug: 406160196
(cherry picked from https://android-review.googlesource.com/q/commit:3a3df3dcaa4610428c9e04db2b2a1a4212eac7f4)
Merged-In: Ic3d2c950249ed745134761bb43cd3eeb5889b303
Change-Id: Ic3d2c950249ed745134761bb43cd3eeb5889b303