Set additional info for LaunchBrowser error case.

A recent change in 3GPP TS 31.124 27.22.4.26 spec for
LAUNCH BROWSER SEQ 1.6. expects an additional info
'Default URL unavailable' incase where default url
is not set.

Fix: In CatService, while handling the Launch Browser
error response include the additonal info 'Default
URL unavailable'.

3GPP Ref link:
http://www.etsi.org/deliver/etsi_ts/131100_131199/131124/
13.02.00_60/ts_131124v130200p.pdf

Bug: 63270501
Change-Id: Idb80c1b8f36749a0ad6e5d53c7a4ac693917d884
diff --git a/src/java/com/android/internal/telephony/cat/CatService.java b/src/java/com/android/internal/telephony/cat/CatService.java
index a242de4..2f3ff3d 100644
--- a/src/java/com/android/internal/telephony/cat/CatService.java
+++ b/src/java/com/android/internal/telephony/cat/CatService.java
@@ -1006,6 +1006,13 @@
                 }
                 break;
             case LAUNCH_BROWSER:
+                if (resMsg.mResCode == ResultCode.LAUNCH_BROWSER_ERROR) {
+                    // Additional info for Default URL unavailable.
+                    resMsg.setAdditionalInfo(0x04);
+                } else {
+                    resMsg.mIncludeAdditionalInfo = false;
+                    resMsg.mAdditionalInfo = 0;
+                }
                 break;
             // 3GPP TS.102.223: Open Channel alpha confirmation should not send TR
             case OPEN_CHANNEL: