Migration of locationpicker module from Java to Kotlin (commons-app#5981)

* Rename .java to .kt

* Migrated location picker module from Java to Kotlin

Author: Saifuddin53

app/src/main/java/fr/free/nrw/commons/LocationPicker/LocationPicker.java

@@ -0,0 +1,72 @@
+package fr.free.nrw.commons.LocationPicker
+
+import android.app.Activity
+import android.content.Intent
+import fr.free.nrw.commons.CameraPosition
+import fr.free.nrw.commons.Media
+
+
+/**
+ * Helper class for starting the activity
+ */
+object LocationPicker {
+
+    /**
+     * Getting camera position from the intent using constants
+     *
+     * @param data intent
+     * @return CameraPosition
+     */
+    @JvmStatic
+    fun getCameraPosition(data: Intent): CameraPosition? {
+        return data.getParcelableExtra(LocationPickerConstants.MAP_CAMERA_POSITION)
+    }
+
+    class IntentBuilder
+    /**
+     * Creates a new builder that creates an intent to launch the place picker activity.
+     */() {
+
+        private val intent: Intent = Intent()
+
+        /**
+         * Gets and puts location in intent
+         * @param position CameraPosition
+         * @return LocationPicker.IntentBuilder
+         */
+        fun defaultLocation(position: CameraPosition): IntentBuilder {
+            intent.putExtra(LocationPickerConstants.MAP_CAMERA_POSITION, position)
+            return this
+        }
+
+        /**
+         * Gets and puts activity name in intent
+         * @param activity activity key
+         * @return LocationPicker.IntentBuilder
+         */
+        fun activityKey(activity: String): IntentBuilder {
+            intent.putExtra(LocationPickerConstants.ACTIVITY_KEY, activity)
+            return this
+        }
+
+        /**
+         * Gets and puts media in intent
+         * @param media Media
+         * @return LocationPicker.IntentBuilder
+         */
+        fun media(media: Media): IntentBuilder {
+            intent.putExtra(LocationPickerConstants.MEDIA, media)
+            return this
+        }
+
+        /**
+         * Gets and sets the activity
+         * @param activity Activity
+         * @return Intent
+         */
+        fun build(activity: Activity): Intent {
+            intent.setClass(activity, LocationPickerActivity::class.java)
+            return intent
+        }
+    }
+}