Revert change to setInitialScale() to take display density into account.

Updated WebView documentation to clarify this behavior.

Additionally, if target-densityDpi is specified in the meta viewport
tag, update the display density in ZoomManager.

Bug: 5477652
Bug: 5327492
Change-Id: I176e87489f76a2ee6595d76a006e302b07595de1
4 files changed