[Panlingual] Remove getCallingPackage and use Uri instead.

- Use uri to pass the package name.
 - Allow adb command to start this function

Bug: 211856852
Test: see b/211856852#2

Change-Id: I3d73d32d7546bf0e3db25d952b2caee934f523dc

src/com/android/settings/Settings.java

@@ -108,6 +108,8 @@ public class Settings extends SettingsActivity {
     public static class InputMethodAndSubtypeEnablerActivity extends SettingsActivity { /* empty */ }
     public static class SpellCheckersSettingsActivity extends SettingsActivity { /* empty */ }
     public static class LocalePickerActivity extends SettingsActivity { /* empty */ }
+    /** Activity for the App locale details settings. */
+    public static class AppLocalePickerActivity extends SettingsActivity { /* empty */ }
     public static class LanguageAndInputSettingsActivity extends SettingsActivity { /* empty */ }
     public static class UserDictionarySettingsActivity extends SettingsActivity { /* empty */ }
     public static class DarkThemeSettingsActivity extends SettingsActivity { /* empty */ }