Print number of converted modules

Previously this was equal to the number of generated targets, but with
recent cc_library changes, we now sometimes generate more than one BUILD
target for a single module. Thus, converted module count is a more
useful metric.

At time of writing, this outputs:
`Converted 390 Android.bp modules to 453 total generated BUILD targets.
Included 4 handcrafted BUILD targets. There are 45093 total Android.bp
modules.`

Test: m bp2build
Change-Id: I7d68880dd4c6bf649ca753837a7f3a9c0d73753a
diff --git a/bp2build/metrics.go b/bp2build/metrics.go
index 1cc4143..b3d5afb 100644
--- a/bp2build/metrics.go
+++ b/bp2build/metrics.go
@@ -1,9 +1,10 @@
 package bp2build
 
 import (
-	"android/soong/android"
 	"fmt"
 	"strings"
+
+	"android/soong/android"
 )
 
 // Simple metrics struct to collect information about a Blueprint to BUILD
@@ -35,7 +36,8 @@
 		generatedTargetCount += count
 	}
 	fmt.Printf(
-		"[bp2build] Generated %d total BUILD targets and included %d handcrafted BUILD targets from %d Android.bp modules.\n With %d modules with unconverted deps \n\t%s",
+		"[bp2build] Converted %d Android.bp modules to %d total generated BUILD targets. Included %d handcrafted BUILD targets. There are %d total Android.bp modules.\n%d converted modules have unconverted deps: \n\t%s",
+		metrics.generatedModuleCount,
 		generatedTargetCount,
 		metrics.handCraftedModuleCount,
 		metrics.TotalModuleCount(),