[Internal] Update path to Doclava

PiperOrigin-RevId: 519850747
(cherry picked from commit cab7269)

Author: Material Design Team

lib/build.gradle

@@ -133,6 +133,7 @@ task generateJavadocs(type: Javadoc) {
   if (project.hasProperty("docletPathRoot")) {
     def docletPathRoot = project.property("docletPathRoot")
     def outputPath = project.hasProperty("outputPath") ? project.property("outputPath") : "doclava-out"
+    def doclavaJar = project.getProperty("doclavaJar")
 
     source = android.sourceSets.main.java.source
     source = source.findAll { it.name.endsWith(".java") }
@@ -144,7 +145,7 @@ task generateJavadocs(type: Javadoc) {
     options.encoding = "UTF-8"
     options.doclet = "com.google.doclava.Doclava"
     options.docletpath = [
-      file(docletPathRoot + "/doclava/current/doclava.jar"),
+      file(doclavaJar),
       file(docletPathRoot + "/jsilver/v1_0_0/jsilver.jar")
     ]
   }