Starting with Android P, Google will force manufacturers to roll out regular security updates for their smartphones. Head of Android platform security David Kleidermacher revealed that the company had modified its OEM agreements to include provisions for regular security patches for all devices. It is unclear if the terms are valid only for flagship devices, or all new devices launched with new Android P or older and existing devices already in the market. As of now, there are not many details about the updated Android partner agreement, but the new changes will definitely have a massive impact on the overall state of Android security.
Source: https://thehackernews.com/2018/05/android-security-updates.html