CI Improvements

• Add caching to the Android build process to improve the job speed (gradle, gem, node, android)
• Add a job to build the Play Store version in parallel with the other build.
• Upload the APK to BrowserStack for test and stable releases.
• Prevent iOS build to run in all branches in circle CI
• Setup supply to upload the APK, the screenshots, and the app metadata.
• Upload the APK to the play store for stable builds.
• Fix iOS signing error
• Fix iOS auth app store

closes #1626 (closed) #1295 (closed) #1628 (closed) #1425 (closed)