automate tests for different android versions and devices

Motivation:

Enable LEAP to build APK's with confidence that they will work on the most widely distributed Android devices and OS versions, given a passing test suite.

Acceptance Criteria:

When code is checked in, automated test suite is run inside a docker container against:

Bank of emulators with fixed device (Samsung Galaxy) and varying API version (16 - 25).
Bank of emulators with fixed API version (23) and varying devices (Galaxy, Nexus, Pixel, ...)

Reasoning:

Samsung Galaxy is the most widely used Android Device
API v 23 (Lollipop) is the most widely installed Android OS

Questions:

API versions 16-18 (Jellybean) account for only 10% of Android users (vs: 20% for Kitkat, 32% for Lollipop 1&2, 31% for Marshmallow, & 5% for Nougat). Should we support it?
What devices should we test against? How much value do we get from varying devices?
I would like to investigate our Google Developer Console to see what the distribution of devices and API versions is among our current userbase. Can I (@aguestuser) have access to do that?

Resources:

# Motivation:

Enable LEAP to build APK's with confidence that they will work on the most widely distributed Android devices and OS versions, given a passing test suite.

# Acceptance Criteria:

When code is checked in, automated test suite is run inside a docker container against:

* Bank of emulators with fixed device (Samsung Galaxy) and varying API version (16 - 25).
* Bank of emulators with fixed API version (23) and varying devices (Galaxy, Nexus, Pixel, ...)

# Reasoning:

* Samsung Galaxy is the most widely used Android Device
* API v 23 (Lollipop) is the most widely installed Android OS

# Questions:

* API versions 16-18 (Jellybean) account for only 10% of Android users (vs: 20% for Kitkat, 32% for Lollipop 1&2, 31% for Marshmallow, & 5% for Nougat). Should we support it?
* What devices should we test against? How much value do we get from varying devices?
* I would like to investigate our Google Developer Console to see what the distribution of devices and API versions is among our current userbase. Can I (@aguestuser) have access to do that?

# Resources:

* [Distribution of different Android Platforms](https://developer.android.com/about/dashboards/index.html#Platform)
* [Distribution of different Android Devices](http://www.appbrain.com/stats/top-android-phones)
* [Distribution of different Android Manufacturers](http://www.appbrain.com/stats/top-manufacturers)

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