nRF Blinky v 2.6.1

What's Changed

• New Splash screen (animated in Android 12+ and compat on Android 5-11) by @philips77 in #56
• Readme updated by @philips77 in #58
• Fixed issue on pre-Lollipop devices by @philips77 in #59

Full Changelog: 2.6.0...2.6.1