tree 908d548b9da674ae72bdebbb48c2cf0f92966914
parent 79d1d6658a93ed7a4cadf2617b4e8897f65d2590
author Aurimas Liutikas <aurimas@google.com> 1597679592 -0700
committer Aurimas Liutikas <aurimas@google.com> 1598476730 -0700

Upgrade androidx to Kotlin 1.4

- clean up new Kotlin warnings after upgrading.
- enable multidex for appcompat and preference tests as
  we are hitting dex limit
- remove new redundant extension method in fragment-ktx

Test: ./busytown/androidx.sh
Bug: 165307851, 165300826
Relnote: Upgrade androidx to use Kotlin 1.4

Change-Id: Id647100407925c16d734c8c43392b4e2d108d0e3