fix(android): properly handle errors

[szymonrybczak]

Summary:

Currently we're not displaying errors if they other than we expect, so even we're not showing errors that we return inside CLI - which leads to situations like this one #2105, when user don't know what to do because the error is only "error Failed to install the app".

Test Plan:

1. Clone the repository and do all the required steps from the Contributing guide
2. Run this command:

node /path/to/react-native-cli/packages/cli/build/bin.js run-android --mode=randomMode

Checklist

• Documentation is up to date to reflect these changes.
• Follows commit message convention described in CONTRIBUTING.md

[szymonrybczak]

Definitely we need more tests in that part of codebase.