Surround phone numbers with LTR unicode mark.

This also removes the previous TextView LTR flag that I had initially added for a one-off.

app/src/main/java/org/thoughtcrime/securesms/phonenumbers/PhoneNumberFormatter.java

@@ -79,7 +79,7 @@ public class PhoneNumberFormatter {
   }
 
   public static @NonNull String prettyPrint(@NonNull String e164) {
-    return get(ApplicationDependencies.getApplication()).prettyPrintFormat(e164);
+    return StringUtil.forceLtr(get(ApplicationDependencies.getApplication()).prettyPrintFormat(e164));
   }
 
   public @NonNull String prettyPrintFormat(@NonNull String e164) {

app/src/main/res/layout/bio_preference_item.xml

@@ -68,7 +68,6 @@
             android:layout_height="wrap_content"
             android:textAlignment="viewStart"
             android:textColor="@color/signal_colorOnSurfaceVariant"
-            android:textDirection="ltr"
             tools:text="+1 (999) 555-1234" />
 
     </LinearLayout>

core-util/src/main/java/org/signal/core/util/StringUtil.java

@@ -322,4 +322,8 @@ public final class StringUtil {
     iterator.setText(text);
     return iterator.countBreaks();
   }
+
+  public static String forceLtr(@NonNull CharSequence text) {
+    return "\u202a" + text + "\u202c";
+  }
 }