Revert "Do not allow apps to set night mode"

This reverts commit 9f4132fa4d5be2436766a802e22991510fe0dd8f.

Reason for revert: This change will break Android Auto and other users of night mode. There is an ongoing discussion to figure out path forward (See http://go/dt-aa-nm)

Change-Id: I37c97e62a3414be7a51a47614f312b97d647dea8
1 file changed