Update documentation for phone account sort order

Update documentation to reflect that the sort order extra
should contain integers.

Bug: 169153499
Test: docs only
Change-Id: Ic5269d577f007e01a0c9eaa95cd7e8814ab8f79a
diff --git a/telecomm/java/android/telecom/PhoneAccount.java b/telecomm/java/android/telecom/PhoneAccount.java
index 4a3561b..866e171 100644
--- a/telecomm/java/android/telecom/PhoneAccount.java
+++ b/telecomm/java/android/telecom/PhoneAccount.java
@@ -49,12 +49,11 @@
 public final class PhoneAccount implements Parcelable {
 
     /**
-     * String extra which determines the order in which {@link PhoneAccount}s are sorted
+     * Integer extra which determines the order in which {@link PhoneAccount}s are sorted
      *
      * This is an extras key set via {@link Builder#setExtras} which determines the order in which
      * {@link PhoneAccount}s from the same {@link ConnectionService} are sorted. The accounts
-     * are sorted by this key via standard lexicographical order, (as implemented in
-     * {@link String#compareTo}), and this ordering is used to
+     * are sorted in ascending order by this key, and this ordering is used to
      * determine priority when a call can be placed via multiple accounts.
      *
      * When multiple {@link PhoneAccount}s are supplied with the same sort order key, no ordering is