Fix in-call UI crash on Nova devcies (framework/base)

If a status hint icon wasn't set we'd crash.
Fix was to set StatusHitns.mIcon to null if the icon resource ID'
was 0.

BUG: 21168985
Change-Id: I33c06169f9e184b063e6fd10f77408bc262ea3c8

telecomm/java/android/telecom/StatusHints.java

@@ -42,7 +42,8 @@ public final class StatusHints implements Parcelable {
     @SystemApi @Deprecated
     public StatusHints(ComponentName packageName, CharSequence label, int iconResId,
             Bundle extras) {
-        this(label, Icon.createWithResource(packageName.getPackageName(), iconResId), extras);
+        this(label, iconResId == 0 ? null : Icon.createWithResource(packageName.getPackageName(),
+            iconResId), extras);
     }
 
     public StatusHints(CharSequence label, Icon icon, Bundle extras) {