Move LLNDK ABI dumps from vndk/ to platform/

Since vndk libraries don't need to maintain Cross-Version abi
compatibility. The newly proposed Cross-Version ABi checking mechanism
is applied to only ndk/ and platform/. The reference dumps of LLNDK
libraries should get from platform/ to be benefited from this checking
mechanism.

Test: mkdir -p prebuilts/abi-dumps/platform/UpsideDownCake/64/x86_64/source-based/ && cp prebuilts/abi-dumps/vndk/32/64/x86_64/source-based/libvndksupport.so.lsdump "$_"
      make libvndksupport -j
Bug: 238383845
Change-Id: I663511d60623cd23619166d8d63fd26220a930e2

android/paths.go

@@ -1474,7 +1474,7 @@ func pathForModuleOut(ctx ModuleOutPathContext) OutputPath {
 // PathForVndkRefAbiDump returns an OptionalPath representing the path of the
 // reference abi dump for the given module. This is not guaranteed to be valid.
 func PathForVndkRefAbiDump(ctx ModuleInstallPathContext, version, fileName string,
-	isNdk, isLlndkOrVndk, isGzip bool) OptionalPath {
+	isNdk, isVndk, isGzip bool) OptionalPath {
 
 	currentArchType := ctx.Arch().ArchType
 	primaryArchType := ctx.Config().DevicePrimaryArchType()
@@ -1486,7 +1486,7 @@ func PathForVndkRefAbiDump(ctx ModuleInstallPathContext, version, fileName strin
 	var dirName string
 	if isNdk {
 		dirName = "ndk"
-	} else if isLlndkOrVndk {
+	} else if isVndk {
 		dirName = "vndk"
 	} else {
 		dirName = "platform" // opt-in libs