Create LocalePickerFragment for fragmentizing LocalePicker Activity.

Need to add proguard.flag, as the Activity crashes without it.

Change-Id: Icbc75be4a4183920ed472ac64cc509115260f865
diff --git a/proguard.flags b/proguard.flags
new file mode 100644
index 0000000..d37d2e0
--- /dev/null
+++ b/proguard.flags
@@ -0,0 +1,2 @@
+# Keep all Fragments in this package, which are used by reflection.
+-keep class com.android.settings.*Fragment