[ann] Custom Proguard JAR now required; Android SDK moved to toolchain tasks in automation
I just landed a mess of code that makes the Fennec build require a custom Proguard JAR  (i.e., not one in the Android SDK) and that migrates the Android SDK fetching from tooltool to the new shiny toolchain tasks . The Android Gradle dependency fetching will migrate soon too .
Assuming this sticks, *you will need to fetch this new Proguard JAR*. You can do so with