This change updates the Android Target API to 36 to satisfy the upcoming
annual Play Store Aug 31 requirement. It updates Keyman for Android to
use API level 36 by changing the compileSdk and targetSdkVersion
properties to 36.
Also update `compileSdkVersion` and some reformatting in `README.md`.
Changes made by AI (Gemini 3 Flash Preview).
Fixes: #16279
Build-bot: release:android
Cherry-pick-of: #16280
Keyman makes it possible for you to type in any language on Windows, macOS, Linux, iPhone, iPad, Android tablets and phones, and even instantly in your web browser. Create keyboard layouts with Keyman Developer and share them with the community in the keyboards repository. The Keyman Community have already contributed keyboard layouts for over 2,000 languages!
License
Copyright (c) SIL Global.
Keyman is an open source project distributed under the MIT license.