AAPT2: Expose split support to command line

Bug:30445078
Change-Id: If4b8530dba71b9059b8e62c04757da99c1119d22
diff --git a/tools/aapt2/ResourceValues.cpp b/tools/aapt2/ResourceValues.cpp
index 4a86579..73682ab 100644
--- a/tools/aapt2/ResourceValues.cpp
+++ b/tools/aapt2/ResourceValues.cpp
@@ -449,9 +449,7 @@
     printMask(out);
 
     if (!symbols.empty()) {
-        *out << " ["
-            << util::joiner(symbols.begin(), symbols.end(), ", ")
-            << "]";
+        *out << " [" << util::joiner(symbols, ", ") << "]";
     }
 
     if (minInt != std::numeric_limits<int32_t>::min()) {
@@ -600,7 +598,7 @@
         *out << parent.value().name.value();
     }
     *out << " ["
-        << util::joiner(entries.begin(), entries.end(), ", ")
+        << util::joiner(entries, ", ")
         << "]";
 }
 
@@ -645,7 +643,7 @@
 
 void Array::print(std::ostream* out) const {
     *out << "(array) ["
-        << util::joiner(items.begin(), items.end(), ", ")
+        << util::joiner(items, ", ")
         << "]";
 }
 
@@ -730,7 +728,7 @@
 
 void Styleable::print(std::ostream* out) const {
     *out << "(styleable) " << " ["
-        << util::joiner(entries.begin(), entries.end(), ", ")
+        << util::joiner(entries, ", ")
         << "]";
 }