Revert "Digest API: allow installer to provide digests for an APK."

Revert "Tests for installer-provided checksums."

Revert submission 12538860-installer-digests

Reason for revert: Droidcop: Potential culprit for b/168445565
Reverted Changes:
I112ba8594:Tests for installer-provided checksums.
I69a787bde:Digest API: allow installer to provide digests for...

Bug: 168445565
Change-Id: I2276373024bb951719cf056d28c4de0838c0519f
15 files changed