Plumb bootclasspath GN -> Android Studio

build/android/gradle/android.jinja

Index: build/android/gradle/android.jinja
diff --git a/build/android/gradle/android.jinja b/build/android/gradle/android.jinja
index 385d999db0f0c940e28e0c1d4e25d35e3be4732c..a49dda9433f81e716e0faf6571fad06330fb6e6e 100644
--- a/build/android/gradle/android.jinja
+++ b/build/android/gradle/android.jinja
@@ -10,11 +10,13 @@
                 "{{ path }}",
 {% endfor %}
             ]
+{% if variables.java_excludes %}
             java.filter.exclude(
 {% for path in variables.java_excludes %}
                 "{{ path }}",
 {% endfor %}
             )
+{% endif %}
             jniLibs.srcDirs = [
 {% for path in variables.jni_libs %}
                 "{{ path }}",
@@ -90,4 +92,9 @@ afterEvaluate {
     tasksToDisable.each { Task task ->
       task.enabled = false
     }
+{% if bootclasspath is defined %}
+    tasks.withType(JavaCompile) {
+      options.bootClasspath = "{{ bootclasspath }}"
+    }
+{% endif %}
 }