Read dexopt concurrency from phenotype flags.

Bug: 307231036

Test: atest ArtServiceTests
(cherry picked from https://android-review.googlesource.com/q/commit:23bdf0606a4d97050de96dfb5a87c32587721579)
Merged-In: I7179d2c46bc4a1e11e8403efe6e0d8bcb159aa0f
Change-Id: I7179d2c46bc4a1e11e8403efe6e0d8bcb159aa0f
3 files changed