Update to AndroidX, Android SdkVersion 29#77

Open

Psijic wants to merge 2 commits intoudacity:1.00-starting-pointfrom

Psijic:update_androidX

Commits on Apr 9, 2020

Update to AndroidX, SdkVersion 29
Psijic
committed

Commits on Apr 11, 2020

start c3
Psijic
committed