Build: Update dependency analysis configuration on sampleapp

This 'unused' related advise for the 'sampleapp' module is actually
correct and 'mediapicker:source-wordpress' can be removed as a
dependency since it is actually unused and not being utilized from
within the sample app.

However, I chose to keep it there and suppress the advise instead in
order to preserve the sample app default configuration, its purpose
being to test all those individual modules:
- mediapicker:source-device
- mediapicker:source-gif
- mediapicker:source-wordpress
- mediapicker:source-camera

As such this advice is instead suppressed and the 'onUnusedDependencies'
exclusion configuration were used to achieve that.

------------------------------------------------------------------------

Advice for :sampleapp
Unused dependencies which should be removed:
  implementation project(':mediapicker:source-wordpress')

Author: ParaskP7

sampleapp/build.gradle

@@ -67,3 +67,12 @@ dependencies {
     implementation "com.google.dagger:hilt-android:$gradle.ext.daggerVersion"
     kapt "com.google.dagger:hilt-compiler:$gradle.ext.daggerVersion"
 }
+
+dependencyAnalysis {
+    issues {
+        onUnusedDependencies {
+            // This dependency is not needed but it is kept to preserve the module's default configuration.
+            exclude(":mediapicker:source-wordpress")
+        }
+    }
+}