1.8.2: 164 Default SMS app for sdk 29+ (#177)

This commit will: 
- Add support for SDK 29+: Using RoleManager to set Gateway as default SMS app.

v1.8.1

Update publishing api key

v1.7.4: Update travis to test, build, sign, and upload to GitHub #145

Updates travis to test, build, sign, and upload tagged builds.

v1.7.3

Gateway apks don't target any specific ABI

Updated target version to Android 9

Updated to avoid lint error, although not entirely required right now, since only updates after Nov 1, 2019 need to be on SDK 28, as per: https://support.google.com/googleplay/android-developer/answer/113469#targetsdk

Example lint error:
> Error: Not targeting the latest versions of Android; compatibility modes apply.

Update for SMS permission declaration

Updated for SMS permission declaration

In accordance with
https://support.google.com/googleplay/android-developer/answer/9047303 and https://support.google.com/googleplay/android-developer/answer/9214102

Required higher target SDK version to be uploaded:
> Upload failed
> Your app currently targets API level 16 and must target at least API level 26 to ensure it is built on the latest APIs optimized for security and performance. Change your app's target API level to at least 26.

v1.7.0: Remove screen orientation from StartupActivity

Fixes startup exception on Android O:

> Only fullscreen opaque activities can request orientation

See: https://stackoverflow.com/questions/48072438/java-lang-illegalstateexception-only-fullscreen-opaque-activities-can-request-o

v1.6.0

travis: upload release APKs for generic build

v1.5.1

Update changelog script to sort versions properly

v1.5.0

• Handle multipart messages properly
• Include app version name in activity title
• Add runtime permission request for READ_PHONE_STATE