Refactor into Multiple Modules

[midhunhk]

Problem Description

Since the number of custom components provided by the library has increased and they are organized into packages by the type of the class, it is messy. Also applications that may need only one or two features need to include the whole library,

Solution

Refactor all the classes to packages by feature and split into multiple modules, so only required components would need to be added as dependency.

Proposing the following module structure:

• [x] core
  • [x] Custom Views
  • [x] Common Models
  • [x] SMS Manager
• [x] billing-client
• [x] contacts-api
• [x] sms-api
• [x] utilities
• [x] multi-contact
• [x] database-helpers
• [x] mocks
• [x] runtime-permissions

Other Tasks

• [x] Distribute via JitPack.io
• [x] Distribute via jCenter
• [x] Generate javadoc for all modules
• [x] Generate landing page with more information
• [x] Remove deprecated code and resources
• [x] Create Migration Guide
• [x] Revisit implementation of complex components

Note: This is an API breaking change, hence we will have a major version release.

[midhunhk]

Research for completing this issue maintained at: https://github.com/midhunhk/ae-apps-library/wiki/Research#version-40

[midhunhk]

Completed

[midhunhk]

JCenter repository is deprecated and will be sunset. https://jfrog.com/blog/into-the-sunset-bintray-jcenter-gocenter-and-chartcenter/