Migrated settings modules from Java to Kotlin (commons-app#5944)

* Rename .java to .kt

* Migrated settings module to Kotlin

app/src/main/java/fr/free/nrw/commons/settings/Prefs.kt

@@ -0,0 +1,21 @@
+package fr.free.nrw.commons.settings
+
+object Prefs {
+    const val GLOBAL_PREFS = "fr.free.nrw.commons.preferences"
+
+    const val TRACKING_ENABLED = "eventLogging"
+    const val DEFAULT_LICENSE = "defaultLicense"
+    const val UPLOADS_SHOWING = "uploadsShowing"
+    const val MANAGED_EXIF_TAGS = "managed_exif_tags"
+    const val DESCRIPTION_LANGUAGE = "languageDescription"
+    const val APP_UI_LANGUAGE = "appUiLanguage"
+    const val KEY_THEME_VALUE = "appThemePref"
+
+    object Licenses {
+        const val CC_BY_SA_3 = "CC BY-SA 3.0"
+        const val CC_BY_3 = "CC BY 3.0"
+        const val CC_BY_SA_4 = "CC BY-SA 4.0"
+        const val CC_BY_4 = "CC BY 4.0"
+        const val CC0 = "CC0"
+    }
+}

app/src/main/java/fr/free/nrw/commons/settings/SettingsActivity.kt

@@ -0,0 +1,63 @@
+package fr.free.nrw.commons.settings
+
+import android.os.Bundle
+import android.view.MenuItem
+import fr.free.nrw.commons.databinding.ActivitySettingsBinding
+import fr.free.nrw.commons.theme.BaseActivity
+
+
+/**
+ * allows the user to change the settings
+ */
+class SettingsActivity : BaseActivity() {
+
+    private lateinit var binding: ActivitySettingsBinding
+//    private var settingsDelegate: AppCompatDelegate? = null
+
+    /**
+     * to be called when the activity starts
+     * @param savedInstanceState the previously saved state
+     */
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivitySettingsBinding.inflate(layoutInflater)
+        val view = binding.root
+        setContentView(view)
+
+        setSupportActionBar(binding.toolbarBinding.toolbar)
+        supportActionBar?.setDisplayHomeAsUpEnabled(true)
+    }
+
+    // Get an action bar
+    /**
+     * takes care of actions taken after the creation has happened
+     * @param savedInstanceState the saved state
+     */
+    override fun onPostCreate(savedInstanceState: Bundle?) {
+        super.onPostCreate(savedInstanceState)
+//        if (settingsDelegate == null) {
+//            settingsDelegate = AppCompatDelegate.create(this, null)
+//        }
+//        settingsDelegate?.onPostCreate(savedInstanceState)
+    }
+
+    override fun onSupportNavigateUp(): Boolean {
+        onBackPressed()
+        return true
+    }
+
+    /**
+     * Handle action-bar clicks
+     * @param item the selected item
+     * @return true on success, false on failure
+     */
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        return when (item.itemId) {
+            android.R.id.home -> {
+                finish()
+                true
+            }
+            else -> super.onOptionsItemSelected(item)
+        }
+    }
+}