Add okhttp3 settings to Functions proguard. (#259)

Author: bklimt

firebase-functions/proguard.txt

@@ -1 +1,17 @@
 -dontwarn okio.**
+
+# These rules come from:
+# https://github.com/square/okhttp/blob/master/okhttp/src/main/resources/META-INF/proguard/okhttp3.pro
+
+# JSR 305 annotations are for embedding nullability information.
+-dontwarn javax.annotation.**
+
+# A resource is loaded with a relative path so the package of this class must be preserved.
+-keepnames class okhttp3.internal.publicsuffix.PublicSuffixDatabase
+
+# Animal Sniffer compileOnly dependency to ensure APIs are compatible with older versions of Java.
+-dontwarn org.codehaus.mojo.animal_sniffer.*
+
+# OkHttp platform used only on JVM and when Conscrypt dependency is available.
+-dontwarn okhttp3.internal.platform.ConscryptPlatform
+

test-apps/functions-test-app/proguard-rules.pro

@@ -2,3 +2,4 @@
 
 -keep class android.support.test.espresso.IdlingResource { *; }
 -keep class android.support.test.espresso.IdlingRegistry { *; }
+