[API 37] Update Android API documentation

[jonathanpeppers]

Summary

• regenerate the Android API reference from the current .NET for Android API 37 bindings
• import documentation from the matching Android SDK API 37 sources
• add 414 documentation files, update 7,713, and remove 2 obsolete files

API level

This PR is specifically for Android API 37 (AndroidApiLevel=37, AndroidPlatformId=37.0).

Validation

• generated from Mono.Android.csproj via UpdateExternalDocumentation
• no translation warnings, placeholder failures, or import failures

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[jonathanpeppers]

@dalexsoto review

[dalexsoto]

The API 37 regeneration drops authored documentation for at least 21 unchanged, signature-matched members across seven files, replacing real summaries/returns/remarks with To be added.. Confirmed examples include parcelable members in NetworkRegistrationInfo, PhysicalChannelConfig, and SubscriptionInfo; TelephonyManager request/radio-family members; six NetworkRegistrationInfoServiceType values; three PhoneNumberSource values; and AccessibleObject.IsAnnotationPresent. Please restore the main-branch prose and add a full signature-keyed preservation check so unchanged members cannot lose authored documentation.

[jonathanpeppers]

@dalexsoto Addressed in dc31eb0f and rebased onto latest main (31260d9f).

The preservation pass now matches members by exact C# signature, falling back to member name/kind/ordered parameter types when generated return or enum projections change. It restores both placeholder replacements and documentation elements removed entirely. Final audit: 130,052 matched members, 0 substantive-to-placeholder regressions, and 0 missing substantive elements. I also resolved the rebase's 69 duplicate DocIds while retaining the pre-rebase API 37 member metadata; all 2,235 changed XML files parse, with 0 duplicate DocIds and 0 conflict markers.

Could you please re-review?

[dalexsoto]

Three completeness blockers remain in the API 37 regeneration:

• A full Android 37 source/signature audit finds 644 new API owners across 159 files still missing 1,179 source-documented elements (14 type descriptions, 623 member descriptions, 159 returns, and 383 parameters), including HealthPermissions.ReadActivityIntensity, String.SplitWithDelimiters, Notification.Metric.FixedTime, and PrinterInfo.Builder.SetSetupIntent.
• Preservation still drops 49 substantive base elements: 48 type-level summaries/remarks across 46 matched types plus the unchanged ActivityManager.GetRecentTasks summary.
• Removing IInputType leaves four exact-head broken xrefs, and OpenPublishing reports 27 deleted public destinations without redirects.

Please repair the API 37 source import, extend preservation to type-level docs and the missing member summary, update stale references, and add redirects/historical handling for every removed destination.