Disable full mode R8 optimizations

Full mode R8 configurations are hindering the working of the app severly.
So, disable the same.

Also, ensure the POJO classes used to hold the API responses aren't optimized
so that we could use the response properly without any issues.

app/proguard-rules.txt

@@ -31,6 +31,8 @@
 -keepattributes Signature
 # Retain declared checked exceptions for use by a Proxy instance.
 -keepattributes Exceptions
+# Classes used by retrofit to fetch API repsonse
+-keepclasseswithmembers class org.wikipedia.** { *; }
 # --- /Retrofit ---
 
 # --- OkHttp + Okio ---

gradle.properties

@@ -15,6 +15,7 @@
 #Thu Mar 01 15:28:48 IST 2018
 org.gradle.jvmargs=-Xmx1536M
 org.gradle.caching=true
+android.enableR8.fullMode=false
 
 KOTLIN_VERSION=1.7.20
 BUTTERKNIFE_VERSION=10.1.0