Fix MediaContent-related API not being generated

[marius-bughiu]

Fixes: #973
Needed for: marius-bughiu/Plugin.AdMob#100

Problem

The IMediaContent interface was not being generated because it contained obfuscated methods (zza(), zzb()) that referenced internal types (com.google.android.gms.internal.ads.zzbfs). This caused the binding generator to skip the entire interface.

As a result, the MediaContent property on NativeAd, MediaView, and related classes was unavailable to .NET developers.

Solution

Added <remove-node> rules to the Metadata.xml transform files to exclude the problematic obfuscated methods from the MediaContent interface:

<remove-node path="/api/package[@name='com.google.android.gms.ads']/interface[@name='MediaContent']/method[@name='zza']" />
<remove-node path="/api/package[@name='com.google.android.gms.ads']/interface[@name='MediaContent']/method[@name='zzb']" />

New API Surface

Android.Gms.Ads.IMediaContent interface with:

• AspectRatio
• CurrentTime
• Duration
• HasVideoContent
• MainImage
• VideoController

MediaContent property now available on:

• NativeAd
• MediaView
• INativeCustomFormatAd

[Copilot]

Pull request overview

Adjusts binding metadata for Google Play Services Ads so MediaContent / IMediaContent is generated again (by removing problematic obfuscated members), restoring expected managed API surface for native ads.

Changes:

• Add remove-node rules for com.google.android.gms.ads.MediaContent.zza/zzb in Ads and Ads.Lite Metadata transforms.
• Update play-services-ads-lite PublicAPI baseline to include Android.Gms.Ads.IMediaContent and related native-ad APIs.
• PublicAPI baseline updates also appear in unrelated packages (kotlinx-* and ads-identifier).

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
source/com.google.android.gms/play-services-ads/Transforms/Metadata.xml	Adds targeted removals for MediaContent.zza/zzb (but duplicates an existing broad zz* method removal rule).
source/com.google.android.gms/play-services-ads-lite/Transforms/Metadata.xml	Adds targeted removals for MediaContent.zza/zzb to prevent interface generation from being blocked.
source/com.google.android.gms/play-services-ads-lite/PublicAPI/PublicAPI.Unshipped.txt	Records newly generated IMediaContent and native-ad related API surface in the public API baseline.
source/org.jetbrains.kotlinx/kotlinx-serialization-core-jvm/PublicAPI/PublicAPI.Unshipped.txt	Adds new KotlinX.Serialization API entries (not described by the PR).
source/org.jetbrains.kotlinx/atomicfu-jvm/PublicAPI/PublicAPI.Unshipped.txt	Adds new AtomicFU API entries (not described by the PR).
source/com.google.android.gms/play-services-ads-identifier/PublicAPI/PublicAPI.Unshipped.txt	Swaps obfuscated method signatures in the public API baseline (not described by the PR).

[Copilot]

In this Metadata.xml you already have a global <remove-node path="/api/*/*/method[contains(@name, 'zz')]" /> rule (line 40) which should remove MediaContent.zza/zzb as well. These new remove-node entries are redundant and may confuse future maintainers about which rule is actually required; consider removing the duplicate rules or narrowing/removing the global rule and keeping only the targeted removals.

Suggested change

	<!-- MediaContent API bindings -->
	<!-- Remove obfuscated methods from MediaContent interface that reference internal types -->
	<remove-node path="/api/package[@name='com.google.android.gms.ads']/interface[@name='MediaContent']/method[@name='zza']" />
	<remove-node path="/api/package[@name='com.google.android.gms.ads']/interface[@name='MediaContent']/method[@name='zzb']" />

[jonathanpeppers]

@marius-bughiu this is kind of what I thought as well, do the new <remove-node/> entries added here, not actually do anything?

[marius-bughiu]

You're right, for play-services-ads those lines were a no-op. I've dropped them, and reverted the play-services-ads NuGet revision bump too since that package no longer changes. The PR now only touches ads-lite.

[marius-bughiu]

Tested the MediaContent APIs via marius-bughiu/Plugin.AdMob#100
The branch contains a Xamarin.GooglePlayServices.Ads.Lite.124.0.0.8.nupkg that can be used for further testing.