Add ProGuard rules for tests

app/build.gradle

@@ -455,6 +455,7 @@ android {
             minifyEnabled true
             signingConfig signingConfigs.release
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard.cfg'
+            testProguardFiles 'test-proguard.cfg'
 
             multiDexKeepProguard file('proguard-multidex.pro')
             // enable crashlytics

app/test-proguard.cfg

@@ -0,0 +1,41 @@
+-optimizationpasses 15
+-dontusemixedcaseclassnames
+-dontskipnonpubliclibraryclasses
+-dontpreverify
+-dontobfuscate
+-verbose
+-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*
+
+-keep public class * extends android.app.Activity
+-keep public class * extends android.app.Application
+-keep public class * extends android.app.Service
+-keep public class * extends android.content.BroadcastReceiver
+-keep public class * extends android.content.ContentProvider
+-keep public class * extends android.app.backup.BackupAgentHelper
+-keep public class * extends android.preference.Preference
+
+#Retrofit Stuff
+-dontnote retrofit2.Platform
+-dontwarn retrofit2.Platform$Java8
+-keepattributes Signature
+-keepattributes Exceptions
+-dontwarn okio.**
+
+-dontwarn java.lang.invoke.*
+-dontwarn **$$Lambda$*
+
+-dontwarn com.sun.javadoc.**
+-dontwarn com.sun.source.tree.**
+-dontwarn com.sun.source.util.**
+-dontwarn com.sun.tools.javac.**
+-dontwarn java.awt.**
+-dontwarn java.lang.ClassValue
+-dontwarn java.lang.management.**
+-dontwarn java.lang.reflect.**
+-dontwarn javax.annotation.processing.**
+-dontwarn javax.lang.model.**
+-dontwarn javax.management.**
+-dontwarn javax.tools.**
+-dontwarn javax.script.**
+-dontwarn javax.swing.**
+-dontwarn org.objectweb.asm.**