Android Marshmallow - Kapil Sharma

New: API 23

• Android Platform Change:
  • Final Permissions User Interface — we updated the permissions user interface and enhanced some of the permissions behavior.

• API Change:
  • Updates to the Fingerprint API — which enables better error reporting, better fingerprint enrollment experience, plus enumeration support for greater reliability.

http://android-developers.blogspot.in/2015/08/m-developer-preview-3-final-sdk.html

Developer Preview 3: 
Build: MPA44G
Hardware support: Nexus 5, 6, 9, Player
Emulator support: x86 & ARM 32/64-bit
Google Play services: 7.8
Key Changes: Permission changes

Install an Image to a Device: 

In order to use a device image for testing, you must install it on a compatible device. Follow the instructions below to install a system image:

1. Download and uncompress one of the system image packages listed here.
2. Backup any data you want to preserve from the device.
3. Follow the instructions at developers.google.com/android to flash the image onto your device.

Set Up the Preview SDK: http://developer.android.com/preview/setup-sdk.html

Android M Preview 3 Developer Docs: 

http://developer.android.com/preview/download.html#top