Allow compiling for Android (native, non-Termux); small formatting fixes

core/copyDROID.go

@@ -0,0 +1,18 @@
+//go:build android && !termux
+
+package core
+
+import (
+	"os/exec"
+)
+
+// copyString copies a string to the clipboard.
+func copyString(continuous bool, copySubject string) {
+	// temporary dummy function to allow Android compilation
+}
+
+// getClipCommands returns the commands for pasting and clearing the clipboard contents.
+func getClipCommands() (*exec.Cmd, *exec.Cmd) {
+	// temporary dummy function to allow Android compilation
+	return nil, nil
+}