[KisaneNeko]

Refs #490

Problem

Every exploded AAR stores its values in res/values/values.xml. Since #413, CopyExplodedResTask copies each library's res/ over the previous one, so only the last library's values survive. A host app with react-native-bootsplash fails at resource linking (attr/bootSplashBackground not found). On main the Expo 58 demo AAR already loses resources of expo-system-ui, expo-status-bar, expo-splash-screen and @callstack/react-native-brownfield.

Change

• CopyExplodedResTask: merge with sdk-common's ResourceMerger, the way AGP's fused library plugin does: one ResourceSet per library, lowest priority first, and one per module static res dir on top. That gives the precedence Android uses in an app (docs): the module's own res and resValues first, then the first library. Qualifier normalization, styleable merging and file vs value collisions come from AGP.
• LibraryResWriter: writes only the library winners the module doesn't define, so each resource ends up once in the generated dir and the "Duplicate resources" failure from Build Failure: Duplicate Resources Error During AAR Packaging with React Native Libraries #125 doesn't come back. An attr with a format declared inside styleables is written once as a top-level <attr>, with a warning when two libraries define it differently.
• drawable/x.png, drawable/x.xml and <drawable name="x"> count as the same resource. For such files the first library now wins; before, the last one did, or both were kept and the build failed.
• libraryOrder input, so the build cache key changes when the library order does. variant.resValues is read only when the feature is on, since AGP 9 has it off by default and warns on every read.
• Adds sdk-common and layoutlib-api as compileOnly, at the same version as common. AGP brings both at runtime; the APIs used are unchanged from 31.12 to 32.3.1.
• CopyExplodedResTaskTest: 16 cases, each reloading the output as one ResourceSet with validation on, as AGP does. AgpCompatibilityMatrixTest now fails if the resValues warning shows up.
• Plugin version bumped to 2.0.0-alpha13 (yarn brownfield:plugin:version:sync). Meant to merge after fix(bgp): package local jars of embedded libraries into the AAR #512 (alpha12).

Verified with react-native-bootsplash 7.1.0 in the RN demo app: on main the consumer AndroidApp fails at processVanillaReleaseResources with the error above and the AAR misses 28 of its 44 entries; with the change none are missing and the consumer builds. Also with a local RN library that has an attr in values and a style using it in values-v31, on Expo 58 and Expo 57. Detox E2E passes for vanilla, Expo 58 and Expo 57, and a module's own app_name now wins over the one from @callstack/react-native-brownfield (on main the library's copy can replace it).

Not covered

Resources from other plugins' generated res dirs (for example google-services) don't count as the module's own: reading them would include this task's own output.