Make StringPiece to be std::string_view alias

Bug: 237583012
Test: build + boot + UTs

Change-Id: I849831f4466d3b9c7ec842b75256e7fcba77a0c0
diff --git a/tools/aapt2/text/Unicode.h b/tools/aapt2/text/Unicode.h
index 546714e..ab3e82b 100644
--- a/tools/aapt2/text/Unicode.h
+++ b/tools/aapt2/text/Unicode.h
@@ -46,11 +46,11 @@
 
 // Returns true if the UTF8 string can be used as a Java identifier.
 // NOTE: This does not check against the set of reserved Java keywords.
-bool IsJavaIdentifier(const android::StringPiece& str);
+bool IsJavaIdentifier(android::StringPiece str);
 
 // Returns true if the UTF8 string can be used as the entry name of a resource name.
 // This is the `entry` part of package:type/entry.
-bool IsValidResourceEntryName(const android::StringPiece& str);
+bool IsValidResourceEntryName(android::StringPiece str);
 
 }  // namespace text
 }  // namespace aapt