Add XML documentation for Android.App.Blob #58

The Android.App.Blob namespace contains 56 To be added placeholders in source XML documentation (excluding docs\xml\index.xml).

Finishability

Finishability: not assessed. The TODO count does not establish whether official Android/Java reference comments exist for every remaining member. A source-coverage pass is still needed; if the official comments are exhausted, use a separately agreed completion approach (for example, reviewed authored documentation based on an authoritative source) rather than another importer pass.

Example command:

rg -n -i --glob 'Android.App.Blob/**' --glob 'ns-Android.App.Blob.xml' 'to be added' docs\xml

Update log

• 2026-10-02: Placeholder count refreshed from 63 to 56 (decreased by 7).
• 2026-09-10: Refreshed the placeholder scan from 59 to 63 (increased by 4). Related documentation PRs: #644.