Deps: Replace androidx legacy support v4 dependency in picasso loader

Although removing the 'androidx.legacy.support.v4' is enough by itself
and the build is not failing, it is better to also replace that with
'androidx.collection' due to this 'androidx.collection.ArrayMap' import
on 'PicassoImageLoader'.

FYI: It got introduced as part of this
(ad68cc9) commit, a part of the
AndroidX migration.

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

This replacement was suggested by the dependency analysis report,
see below:

Advice for :picasso-loader
Unused dependencies which should be removed:
  implementation 'androidx.legacy:legacy-support-v4:1.0.0'
  ...

These transitive dependencies should be declared directly:
  implementation 'androidx.collection:collection:1.1.0'

Author: ParaskP7

picasso-loader/build.gradle

@@ -25,7 +25,7 @@ android {
 dependencies {
     implementation aztecProjectDependency
 
-    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
+    implementation 'androidx.collection:collection:1.1.0'
     implementation 'com.google.android.material:material:1.0.0'
 
     implementation "com.squareup.picasso:picasso:$picassoVersion"