Convert javacflags -> javacopts for java_binary_host

This has already been done for java_library modules, we need to add
similar support for java_binary_host.

Bug: 213456294
Test: go test ./bp2build
Change-Id: Idf7b631f3afe9f59e50f9e45bcbdc29fb5923cc6

java/java.go

@@ -24,6 +24,7 @@ import (
 	"strings"
 
 	"android/soong/bazel"
+
 	"github.com/google/blueprint"
 	"github.com/google/blueprint/proptools"
 
@@ -2000,6 +2001,7 @@ type javaBinaryHostAttributes struct {
 	Deps       bazel.LabelListAttribute
 	Main_class string
 	Jvm_flags  bazel.StringListAttribute
+	Javacopts  bazel.StringListAttribute
 }
 
 // JavaBinaryHostBp2Build is for java_binary_host bp2build.
@@ -2021,6 +2023,10 @@ func javaBinaryHostBp2Build(ctx android.TopDownMutatorContext, m *Binary) {
 		Main_class: mainClass,
 	}
 
+	if m.properties.Javacflags != nil {
+		attrs.Javacopts = bazel.MakeStringListAttribute(m.properties.Javacflags)
+	}
+
 	// Attribute deps
 	deps := []string{}
 	if m.properties.Static_libs != nil {