Don't display bugreport progress when it recedes, for real...

The previous fix was taking account just the progress reported by dumpstate,
not progress/percentage. As such, it was not detecting the cases where the
percentage decreased but the progress didn't.

Bug: 37878670
Test: m -j32 adb_test && ./out/host/linux-x86/nativetest64/adb_test/adb_test --gtest_filter=BugreportTest.*

Change-Id: I5830028f3191a9b17f63aeed5c049b29fa7d1179
diff --git a/adb/bugreport.h b/adb/bugreport.h
index ee99cbc..d9a4468 100644
--- a/adb/bugreport.h
+++ b/adb/bugreport.h
@@ -43,7 +43,7 @@
                             const char* name);
 
   private:
-    virtual void UpdateProgress(const std::string& file_name, int progress, int total);
+    virtual void UpdateProgress(const std::string& file_name, int progress_percentage);
     LinePrinter line_printer_;
     DISALLOW_COPY_AND_ASSIGN(Bugreport);
 };