Android: Make incremental install work for two <instrumentation>

build/android/incremental_install/java/org/chromium/incrementalinstall/SecondInstrumentation.java

Index: build/android/incremental_install/java/org/chromium/incrementalinstall/SecondInstrumentation.java
diff --git a/build/android/incremental_install/java/org/chromium/incrementalinstall/SecondInstrumentation.java b/build/android/incremental_install/java/org/chromium/incrementalinstall/SecondInstrumentation.java
new file mode 100644
index 0000000000000000000000000000000000000000..3e0df0521e947bbb7a1e58ed8858297be993d7fb
--- /dev/null
+++ b/build/android/incremental_install/java/org/chromium/incrementalinstall/SecondInstrumentation.java
@@ -0,0 +1,12 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.incrementalinstall;
+
+import android.app.Instrumentation;
+
+/**
+ * Exists to support an app having multiple instrumentations.
+ */
+public final class SecondInstrumentation extends Instrumentation {}