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* Remove anchors for <application> since every manfiest change will cause
  it to change.
* Use android:name to compute anchors when available since that will
  lead to stable anchors when attributes / children are changed.
* Prevent self-closing tags for <service>, <activity>, etc.
* Added test.

Bug: 1064151
Change-Id: Ia0c242c713b58c6cb54556e6d0b82a559ad9858a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2340644
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Mohamed Heikal <mheikal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795923}