Disable AAPT2 in gradle.properties

This is a workaround for
https://issuetracker.google.com/issues/64434571. It was originally
added only as an option in Android Studio, after user reported the
issue.

gradle.properties

@@ -12,6 +12,9 @@
 # Default value: -Xmx10248m -XX:MaxPermSize=256m
 org.gradle.jvmargs=-Xmx3072M -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
 
+# Workaround for https://issuetracker.google.com/issues/64434571
+android.enableAapt2=false
+
 # When configured, Gradle will run in incubating parallel mode.
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects