Add native Android storage inspector

[isomorphisms]

Stacks on PR #4 (storage-inspector-debug-view) and turns its read-only storage contract into the first phone-visible developer inspector.

Scope

• NDK NativeActivity; no WebView, browser renderer, Python runtime, or app Java/Kotlin code
• C performs rooted O_NOFOLLOW traversal and file opens directly against <internal files>/state
• Android framework ScrollView/TextView only paints the debug text
• overview totals and classification totals
• bounded tab-manifest parsing (20 shown, 64 KiB per manifest)
• bounded physical-file rows with canonical/derived/snapshot/cache/secret/unknown classification
• bounded 1 MiB tail of canonical visits.jsonl with stable byte offsets
• secret/unknown/cache/snapshot content remains metadata-only
• resume refreshes the view; the inspector never creates or mutates storage

This deliberately does not add cache deletion, index rebuilding, renderer wake/kill controls, or normal browser UI. Those are separate maintenance/browser slices.

Validation

• host C syntax check passes with -Wall -Wextra -Wpedantic
• host smoke check covers schema classification, bounded summary parsing, and refusal to follow a symlink escape
• CI runs the existing Python storage/history contract plus a real Android debug APK build and uploads the APK artifact