6700 proguard update (#6718)

* [android] - include net package in proguard config, added the default EnclosingMethod disable warning and fixed up typo.

* update test app dependency leak canary to do a proguard release build, replaced keep support lib classes by dontwarn following Google guidelines, remove outdated/obsolete square configuration

platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/MapboxApplication.java

@@ -11,12 +11,18 @@ public class MapboxApplication extends Application {
     @Override
     public void onCreate() {
         super.onCreate();
-        MapboxAccountManager.start(getApplicationContext(), getString(R.string.mapbox_access_token));
+
+        if (LeakCanary.isInAnalyzerProcess(this)) {
+            // This process is dedicated to LeakCanary for heap analysis.
+            // You should not init your app in this process.
+            return;
+        }
         LeakCanary.install(this);
+
         StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
                 .detectDiskReads()
                 .detectDiskWrites()
-                .detectNetwork()   // or .detectAll() for all detectable problems
+                .detectNetwork()
                 .penaltyLog()
                 .build());
         StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
@@ -24,5 +30,7 @@ public class MapboxApplication extends Application {
                 .penaltyLog()
                 .penaltyDeath()
                 .build());
+
+        MapboxAccountManager.start(getApplicationContext(), getString(R.string.mapbox_access_token));
     }
 }