Remove obsolete class loader context API and update unit tests.

The removed API has been unused since https://r.android.com/1533342
(except for unit tests).

Changes in the unit tests reflect the change of API in
https://r.android.com/1533342: early errors caused by unknown library
paths at CLC construction time have been replaced with late errors at
the time of CLC validation.

Bug: 132357300
Test: m nothing
Change-Id: I739c7c41b6f882b7e28cdd6acd05961d754d8687

java/app.go

@@ -1221,7 +1221,7 @@ func (u *usesLibrary) classLoaderContextForUsesLibDeps(ctx android.ModuleContext
 			if tag, ok := ctx.OtherModuleDependencyTag(m).(usesLibraryDependencyTag); ok {
 				dep := ctx.OtherModuleName(m)
 				if lib, ok := m.(UsesLibraryDependency); ok {
-					clcMap.AddContextForSdk(ctx, tag.sdkVersion, dep,
+					clcMap.AddContext(ctx, tag.sdkVersion, dep,
 						lib.DexJarBuildPath(), lib.DexJarInstallPath(), lib.ClassLoaderContexts())
 				} else if ctx.Config().AllowMissingDependencies() {
 					ctx.AddMissingDependencies([]string{dep})