Upgrade to Robolectric 4.6

The tests now pass without @DoNotInstrument

I had to tweak the jetification settings due to a bug in the jetifier
shipped with the Android Gradle Plugin. More details:
https://github.com/robolectric/robolectric/issues/6521#issuecomment-851736355

PiperOrigin-RevId: 382757006

constants.gradle

@@ -24,7 +24,7 @@ project.ext {
     guavaVersion = '27.1-android'
     mockitoVersion = '3.4.0'
     mockWebServerVersion = '3.12.0'
-    robolectricVersion = '4.5.1'
+    robolectricVersion = '4.6'
     checkerframeworkVersion = '3.3.0'
     checkerframeworkCompatVersion = '2.5.0'
     jsr305Version = '3.0.2'

gradle.properties

@@ -1,5 +1,7 @@
 ## Project-wide Gradle settings.
 android.useAndroidX=true
 android.enableJetifier=true
+# https://github.com/robolectric/robolectric/issues/6521#issuecomment-851736355
+android.jetifier.blacklist=bcprov
 buildDir=buildout
 org.gradle.jvmargs=-Xmx2g -XX:MaxMetaspaceSize=512m