Fix app install icon colors by "reverting" small color change that applies to...

Fix app install icon colors by "reverting" small color change that applies to the private install icon.

Original big color change for reference: ag/28129361

bug:355065774
Test manually:
after LT: https://drive.google.com/file/d/1Wi09fvakgGev_kbRso4LggXRb4GLYCsL/view?usp=sharing
after DT: https://drive.google.com/file/d/1g5NOeV50ekEJl0-7hiSWYLPKsCCGbndP/view?usp=sharing
Flag: NONE color fix

Change-Id: Ie078eefe2b4b2ecf6aa1a086242ba643f42c038b