test(runtime): add the Log.e overload with a throwable to the test shim

The first-install fallback logs the failed fetch with its exception, and the
shim only had the two-argument form, so the test hit NoSuchMethodError.

runtime/src/test/java/android/util/Log.java

@@ -22,5 +22,10 @@ public class Log {
         return 0;
     }
 
+    public static int e(String tag, String msg, Throwable tr) {
+        System.out.println("ERROR: " + tag + ": " + msg + ": " + tr);
+        return 0;
+    }
+
     // add other methods if required...
 }