feat: Android SDK update for version 25.0.0

[ArnabChatterjee20k]

This PR contains updates to the Android SDK for version 25.0.0.

[greptile-apps]

Greptile Summary

This PR updates the Android SDK to version 25.0.0 with several breaking changes: Theme is renamed to BrowserTheme, Presence<T>/PresenceList<T> are de-generified to concrete types (metadata is now Any?), and convenience overloads in Presences are collapsed into single non-generic methods.

• Document.kt and Row.kt fix a longstanding bug where a missing "data" key fell back to an empty map; it now falls back to the full document/row map, enabling correct flat-response deserialization.
• Kotlin example docs are corrected: lowercase theme.LIGHT and timezone.AFRICA_ABIDJAN are replaced with the proper class-qualified forms BrowserTheme.LIGHT and Timezone.AFRICA_ABIDJAN.

Confidence Score: 5/5

The changes are a clean, self-contained SDK version bump — model and service simplifications with no critical logic paths affected.

All functional changes are straightforward: a rename, generic removal, a fallback fix, and version header bump. No data mutations, no auth paths, and no new runtime risks are introduced.

No files require special attention beyond the already-noted unused imports.

Important Files Changed

Filename	Overview
library/src/main/java/io/appwrite/services/Presences.kt	Generic type parameters removed; convenience overloads deleted; classOf() import now unused; @Throws(AppwriteException::class) no longer present on the new unified methods
library/src/main/java/io/appwrite/models/Presence.kt	Converted from generic Presence<T> to concrete Presence; metadata field added as Any?; jsonCast import now unused
library/src/main/java/io/appwrite/models/PresenceList.kt	Converted from generic PresenceList<T> to concrete type; jsonCast import now unused
library/src/main/java/io/appwrite/models/Document.kt	Fallback for missing "data" key changed from empty map to full document map, enabling correct flat-document deserialization
library/src/main/java/io/appwrite/models/Row.kt	Same fallback fix as Document.kt: missing "data" key now falls back to the full row map instead of an empty map
library/src/main/java/io/appwrite/enums/BrowserTheme.kt	Renamed from Theme.kt to BrowserTheme.kt; enum class renamed accordingly; no logic changes
library/src/main/java/io/appwrite/Client.kt	SDK version header bumped from 24.2.0 to 25.0.0

_{Reviews (2): Last reviewed commit: "chore: update Android SDK to 25.0.0" | Re-trigger Greptile}

[greptile-apps]

map["metadata"] already returns Any?, so as? Any is a safe cast that always succeeds and is effectively a no-op. The assignment can be simplified to just map["metadata"].

Suggested change

	metadata = map["metadata"] as? Any,
	metadata = map["metadata"],