Update java.lang.String class size.

In standalone desugar, one of the implemented interface CharSequence has
two lambdas:

lambda$chars$0$CharSequence
lambda$codePoints$1$CharSequence

which are virtual functions.

In D8 Desugar, both of them are now direct methods.

Bug: 69477285
Test: USE_D8_DESUGAR=true m && USE_D8_DESUGAR=false m
Change-Id: I94aaa42e86bd104fc86fa14d1eb45b2e906da5a9
diff --git a/build/art.go b/build/art.go
index 3f598da..58df11c 100644
--- a/build/art.go
+++ b/build/art.go
@@ -103,6 +103,10 @@
 		asflags = append(asflags, "-DART_MIPS32_CHECK_ALIGNMENT")
 	}
 
+	if envTrue(ctx, "USE_D8_DESUGAR") {
+		cflags = append(cflags, "-DUSE_D8_DESUGAR=1")
+	}
+
 	return cflags, asflags
 }