Added rules to exclude generated classes from jars during build

BUG:30700781
Change-Id: Ica4ebb43b4c10514027ce866eeac7acb3dd80004
diff --git a/build.gradle b/build.gradle
index 80d48c7..f31ec5a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -497,6 +497,8 @@
                             name: "package${v.name.capitalize()}ClassFilesForCoverageReport",
                             type: Jar) {
                         from v.testedVariant.javaCompile.destinationDir
+                        exclude "**/R.class"
+                        exclude "**/R\$*.class"
                         destinationDir file(project.distDir)
                         archiveName "${project.archivesBaseName}-${v.baseName}-allclasses.jar"
                     }