MBL-2874: Disable r8 (temporarily) further QA required for dependencies (#2452)

- Disable r8 (temporarily)

app/build.gradle

@@ -92,23 +92,18 @@ android {
 
     buildTypes {
         release {
+            minifyEnabled false
             if (isCircle && isPrivateCIEnv && isRelease) {
                 signingConfig signingConfigs.release
             } else {
                 signingConfig signingConfigs.debug
             }
-            minifyEnabled true
-            shrinkResources true
-            proguardFiles(
-                getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
-            )
         }
         debug {
             minifyEnabled false
             debuggable true
             applicationIdSuffix '.debug'
             signingConfig signingConfigs.debug
-
             FirebasePerformance {
                 // Set this flag to 'false' to disable @AddTrace annotation processing and
                 // automatic monitoring of HTTP/S network requests