annotation: make GeneratedAppGlideModuleImpl public to fix Kotlin 2.2.20 visibility warning (#5601)

[iVamsi]

Fix Kotlin 2.2.20 visibility warning (#5601)

Description

Make GeneratedAppGlideModule and the KAPT-generated GeneratedAppGlideModuleImpl public.

The KSP processor generates GeneratedAppGlideModuleImpl as internal, which extends GeneratedAppGlideModule — a Java class with package-private visibility. Kotlin 2.2.20 introduced stricter visibility checks ([KTLC-271] https://youtrack.jetbrains.com/issue/KTLC-271)) that flag this as a warning, and it will become a hard error in Kotlin 2.4:

w: GeneratedAppGlideModuleImpl.kt:12:5 'internal' declaration exposes 'public/*package*/'
   type 'GeneratedAppGlideModule'. This will become an error in language version 2.4.

Fix: make GeneratedAppGlideModule public. Since it is by design subclassed across module boundaries by generated code, public is the correct visibility. The KAPT-generated GeneratedAppGlideModuleImpl is also made public for consistency.

Motivation and Context

Fixes #5601.

Kotlin 2.2.20 introduced KTLC-271, which warns (and will error in 2.4) when an internal Kotlin declaration exposes a type with lower visibility. Because GeneratedAppGlideModule was package-private in Java, the internal KSP-generated subclass triggered this rule. Making the base class public resolves the mismatch without changing any user-facing API.

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