Prep for external sync.

* Bump dependencies on angular packages.
* Add new .build_tool directory to files ignored by git.
* Update CHANGELOG.
* Update copybara transformations.

PiperOrigin-RevId: 188222043

Author: nshahan

.gitignore

@@ -1,4 +1,5 @@
 # Files and directories created by pub
+.dart_tool
 .packages
 .pub/
 build/

CHANGELOG.md

@@ -1,15 +1,19 @@
 ## 0.9.0-alpha+7
 
 > NOTE: This code is considered production quality, but depends on angular:
-> 5.0.0-alpha+6. The alpha tag represents the evolving nature of the AngularDart
-> API, not code quality (5.0.0-alpha+6 is used in production Google apps).
+> 5.0.0-alpha+7. The alpha tag represents the evolving nature of the AngularDart
+> API, not code quality (5.0.0-alpha+7 is used in production Google apps).
 
  * Material Button: Add compact mode.
  * Material Expansionpanel: Add option show/hide the cancel button.
  * Material Select:
    * Add option to dropdown to disable deselecting on trigger.
    * Allow content to be projected as list header and list footer in dropdown.
- * Material Menu: Trigger selected event when an item from sub-menu is selected.
+   * Implement Focusable in `DropdownButtonComponent`.
+   * Fixed an alignment issue with the icon on dropdowns.
+ * Material Menu:
+   * Trigger selected event when an item from sub-menu is selected.
+   * Change mouse pointer on catagory to make it clear that it is clickable.
  * Material Tooltip: Change `tooltipSource` directive to use `style.cursor`.
  * Allow '\[' for start of word of highlight match.
  * Use @visibleForTesting annotations.

pubspec.yaml

@@ -8,8 +8,8 @@ author: Dart Team <[email protected]>
 environment:
   sdk: '>=2.0.0-dev.3.0 <2.0.0'
 dependencies:
-  angular: 5.0.0-alpha+6
-  angular_forms: 1.0.1-alpha+6
+  angular: 5.0.0-alpha+7
+  angular_forms: 1.0.1-alpha+7
   build: '>=0.11.1 <0.13.0'
   build_config: ^0.2.1
   built_collection: '>=1.6.0 <4.0.0'