Move tests to .test package

This will be used for excluding the tests in coverage configs. Also in
general tests should probably be a different package than the apk they
test.

Bug: 135956699
Test: atest CellBroadcastServiceTests
Change-Id: Ib10d694737ffa40c1eee063f8ac789a01dbdc7dd
diff --git a/src/com/android/cellbroadcastservice/GsmCellBroadcastHandler.java b/src/com/android/cellbroadcastservice/GsmCellBroadcastHandler.java
index 637edd4..f2fbec5 100644
--- a/src/com/android/cellbroadcastservice/GsmCellBroadcastHandler.java
+++ b/src/com/android/cellbroadcastservice/GsmCellBroadcastHandler.java
@@ -61,7 +61,7 @@
             new HashMap<>(4);
 
     @VisibleForTesting
-    protected GsmCellBroadcastHandler(Context context, Looper looper) {
+    public GsmCellBroadcastHandler(Context context, Looper looper) {
         super("GsmCellBroadcastHandler", context, looper);
     }