Android is open source and can be used by any company, but the Google has some requirements to release the Play Store and apps like Gmail and YouTube: one of the rules says that after January 31, 2020, only devices with Android 10, not with Android 9 Pie. In addition, Google requires Digital Wellbeing and compatibility with the Power Delivery charging standard via USB-C port.
O XDA Developers obtained the most recent version of the GMS (Google Mobile Services) requirements, which manufacturers must comply with to include the Play Store and Play Services in their products.
In the document, Google says it will stop approving devices with Android 9 Pie after January 31, 2020. As of that date, only Android 10 will be accepted on new smartphones and tablets.
What about devices already released? In this case, the deadline is longer: Google will authorize the update to Android 9 Pie until the launch of Android 11 R, which should take place in August 2020. After that, the manufacturer will have to jump straight to a newer version. (such as Android 10) or provide only security patches.
In addition, Google requires that every device released after September 3, 2019 have a Digital Wellness feature, either the Android standard or a custom solution. It is essential to have a panel with the time of use of each application, the possibility to set timers for apps, and something similar to Relax (which activates the do not disturb mode at specific times).
This rule includes new phones and tablets launched with Android 9 Pie or Android 10, in addition to devices that are updated to one of these versions after September 3.
Google has rule for devices with USB-C port
Finally, Google is creating a new requirement: Every device with a USB-C port must be compatible with the USB-C PD (Power Delivery) fast charging standard. This technology is capable of providing up to 100 W of power, but it has been neglected by some manufacturers, who prefer to adopt proprietary solutions.
O Android Authority did the test and found, for example, that the OnePlus 6T reaches 15.54 W with the charger that comes in the box, and only 7.23 W with a USB-C PD charger. The LG V30 reaches almost 15 W with the proprietary accessory, and only 4.89 W with a cable and connector that meets Power Delivery standards.
Now, one of the requirements of the GMS says the following:
New DEVICES launched from 2019 onwards with USB Type-C port MUST guarantee complete interoperability with chargers that are compatible with USB specifications and that have the USB Type-C connector.
It is worth noting that Android devices with microUSB can still be launched, and will not need to be compatible with USB PD. We will probably see the effect of these new rules on phones and tablets launched in 2020.