WebView implementation Dev setting: Show the version number after name

Show the package version of each WebView implementation after their
package name in the WebView Implementation Dev Setting. Showing a
package version is useful for debugging purposes.

Bug: 35621558
Test: run make RunSettingsRoboTests
Test: Ensure package version is shown in titles of items in WebView
Implementation Dev Setting.
Change-Id: If195dd87aebeac1783600b7c9f376ff8e791c3be