Prepare for future minification

Signed-off-by: Jonas Kalderstam <jonas@kalderstam.se>

library/build.gradle

@@ -17,8 +17,9 @@ android {
     }
     buildTypes {
         release {
-            //minify false
-            //proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
+            //minifyEnabled true
+            //shrinkResources true
+            //proguardFiles getDefaultProguardFile('proguard-android.txt')
         }
     }
 }

sample/build.gradle

@@ -13,8 +13,11 @@ android {
 
     buildTypes {
         release {
-            //runProguard false
-            //proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
+            release {
+                //minifyEnabled true
+                //shrinkResources true
+                //proguardFiles getDefaultProguardFile('proguard-android.txt')
+            }
         }
     }
 }