Rename CustomElement.build to buildInternal

[dvoytenko]

Partial for #31915.

This is a very trivial refactoring, but a lot of test diffs. Need for a more complete #32002 refactoring.

[amp-owners-bot]

Hey @alanorozco! These files were changed:

extensions/amp-3q-player/0.1/test/test-amp-3q-player.js
extensions/amp-brid-player/0.1/test/test-amp-brid-player.js
extensions/amp-connatix-player/0.1/test/test-amp-connatix-player.js
extensions/amp-delight-player/0.1/test/test-amp-delight-player.js
extensions/amp-kaltura-player/0.1/test/test-amp-kaltura-player.js
extensions/amp-minute-media-player/0.1/test/test-amp-minute-media-player.js
extensions/amp-nexxtv-player/0.1/test/test-amp-nexxtv-player.js
extensions/amp-o2-player/0.1/test/test-amp-o2-player.js
extensions/amp-powr-player/0.1/test/test-amp-powr-player.js
extensions/amp-reach-player/0.1/test/test-amp-reach-player.js
extensions/amp-springboard-player/0.1/test/test-amp-springboard-player.js
extensions/amp-viqeo-player/0.1/test/test-amp-viqeo-player.js
+1 more

Hey @gmajoulet, @newmuis, @Enriqe! These files were changed:

extensions/amp-story/1.0/test/test-amp-story-page.js
extensions/amp-story/1.0/test/test-amp-story.js

[samouri]

Can you explain the rename? Are you making a new build() that uses buildInternal?

[dvoytenko]

Can you explain the rename? Are you making a new build() that uses buildInternal?

Yes.