Add unit tests for class loader context.

Test: lunch aosp_cf_x86_phone-userdebug && m
Bug: 132357300
Change-Id: I96a1e6cef86652e429b1678a655fc0b02f40d00c
diff --git a/dexpreopt/Android.bp b/dexpreopt/Android.bp
index 94c0361..35f90df 100644
--- a/dexpreopt/Android.bp
+++ b/dexpreopt/Android.bp
@@ -8,6 +8,7 @@
         "testing.go",
     ],
     testSrcs: [
+        "class_loader_context_test.go",
         "dexpreopt_test.go",
     ],
     deps: [