Google May Finally Enable Custom Themes Built on Sony's RRO Framework

The Android O Developer Preview has a mysterious display theme setting. XDA has concluded that this theming framework is based on Sony's RRO.

By  Mishaal Rahman May 18, 2017

In case you aren't already aware, Google has released the second Android O Developer Preview (Android O DP2) during yesterday's I/O event. We've already done a deep dive into everything new we've found thus far, but there was one thing about DP2 that was bugging me. Everyone who received the beta update or manually flashed the new images were quickly met with a radically different UI in quick settings. Why in the world did Google decide to change the theme? After some more testing and digging, I've come to a conclusion. For whatever reason, Google has decided to make its "Inverted" theme the default theme; perhaps while the company was in the middle of testing a custom theming solution based on Sony's Runtime Resource Overlay (RRO), they weren't able to get the default Pixel theme working in time for the Android O Beta release.