AAPT2: Auto-version adaptive-icon XML

Auto version adaptive-icon XML to v26.

This change makes the logic for generating versioned resources
simpler by changing the comparison function of ResTable_config
to evaluate the sdkVersion property last, making configurations
that differ only in sdkVersion next to each other in a sorted vector.

Bug: 62316340
Test: manual (verified output of tools/aapt2/integration-tests/AppOne)
Change-Id: I977d45821722a65d2135efb4693304eacc565c9a
diff --git a/tools/aapt2/util/TypeTraits.h b/tools/aapt2/util/TypeTraits.h
index b6539ed..6fcb4bdb 100644
--- a/tools/aapt2/util/TypeTraits.h
+++ b/tools/aapt2/util/TypeTraits.h
@@ -38,6 +38,7 @@
 
 DEFINE_HAS_BINARY_OP_TRAIT(has_eq_op, ==);
 DEFINE_HAS_BINARY_OP_TRAIT(has_lt_op, <);
+DEFINE_HAS_BINARY_OP_TRAIT(has_lte_op, <=);
 
 /**
  * Type trait that checks if two types can be equated (==) and compared (<).