Rename android-studio-canary to android-studio-preview (#4657)

* Fix android-studio-canary conflict with android-studio

* Rename android-studio-canary to android-studio-preview

Casks/android-studio-canary.rb → Casks/android-studio-preview.rb

@@ -1,15 +1,14 @@
-cask 'android-studio-canary' do
+cask 'android-studio-preview' do
   version '3.0.0.17,171.4402976'
   sha256 'b96a13a25562c44a3b213c25afa0c64eab888e653f71b16b1edf940efecabfdf'
 
   # google.com/dl/android/studio was verified as official when first introduced to the cask
   url "https://dl.google.com/dl/android/studio/ide-zips/#{version.before_comma}/android-studio-ide-#{version.after_comma}-mac.zip"
-  name 'Android Studio Canary'
+  name 'Android Studio Preview'
   homepage 'https://developer.android.com/studio/preview/'
 
-  conflicts_with cask: 'android-studio'
-
-  app 'Android Studio.app'
+  # Renamed to avoid conflict with android-studio.
+  app 'Android Studio.app', target: 'Android Studio Preview.app'
 
   zap delete: [
                 "~/Library/Application Support/AndroidStudioPreview#{version.major_minor}",