This flag enables support for Android Studio 3.0 which allows us to use
Java 8 features. Gradle is updated to version 4.1.0.
BUG=webrtc:8084
Review-Url: https://codereview.webrtc.org/2994123002
Cr-Commit-Position: refs/heads/master@{#19319}
This prevents user from accidentally specifying a directory that contains
files that the user wants to keep.
BUG=webrtc:7608
NOTRY=True
Review-Url: https://codereview.webrtc.org/2876803002
Cr-Commit-Position: refs/heads/master@{#18096}