feat(devices): add Pixel 6 through Pixel 10 device descriptors

[dgozman]

Summary

Adds 14 missing Pixel device families (portrait + landscape variants) to the built-in device descriptors: Pixel 6, 6 Pro, 6a, 7 Pro, 7a, 8, 8 Pro, 8a, 9, 9 Pro, 9 Pro XL, 10, 10 Pro, 10 Pro XL.

CSS viewport sizes and device pixel ratios were sourced from yesviz.com (Pixel 6 — Pixel 9 series) and cross-checked against Google's published display specs. Pixel 10 series specs were derived from whatismyscreensize.com — the displays match the Pixel 9 series exactly. screen / viewport / chrome-UI offsets follow the existing Pixel 7 entry's convention.

Fixes #40910

[github-actions]

Test results for "MCP"

8 failed
❌ [chromium] › mcp/annotate.spec.ts:273 › should enter annotate mode on fresh dashboard.tsx mount with -s --annotate @mcp-windows-latest-chromium
❌ [firefox] › mcp/dashboard.spec.ts:182 › two concurrent cli show invocations both succeed @mcp-windows-latest-firefox
❌ [webkit] › mcp/annotate.spec.ts:230 › should capture annotations via show --annotate @mcp-windows-latest-webkit
❌ [webkit] › mcp/annotate.spec.ts:251 › should start dashboard and annotate when no dashboard is running @mcp-windows-latest-webkit
❌ [webkit] › mcp/annotate.spec.ts:428 › should switch screencast to -s session on show --annotate @mcp-windows-latest-webkit
❌ [webkit] › mcp/annotate.spec.ts:478 › should disengage annotate mode when --annotate client disconnects @mcp-windows-latest-webkit
❌ [webkit] › mcp/cli-devtools.spec.ts:217 › video-start-stop @mcp-windows-latest-webkit
❌ [webkit] › mcp/dashboard.spec.ts:182 › two concurrent cli show invocations both succeed @mcp-windows-latest-webkit

7173 passed, 1113 skipped

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Merge workflow run.

[github-actions]

Test results for "tests 1"

3 flaky

⚠️ [chromium-library] › library/beforeunload.spec.ts:130 › should support dismissing the dialog multiple times `@ubuntu-22.04-chromium-tip-of-tree`
⚠️ [chromium-library] › library/popup.spec.ts:261 › should not throw when click closes popup `@ubuntu-22.04-chromium-tip-of-tree`
⚠️ [chromium-library] › library/video.spec.ts:719 › screencast › should work with video+trace `@chromium-ubuntu-22.04-node20`

42030 passed, 850 skipped

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Merge workflow run.