Assign default texture id of 0

Some logic depends on a default value of 0, which was not being
assigned.

Issue #7195815 chrome url bar is corrupted
Issue #7190656 Textures corrupted on mr1

Change-Id: I346b7b76e885bf8f04740e711fd88f917a5418c7
diff --git a/libs/hwui/Texture.h b/libs/hwui/Texture.h
index 1adf2c7..03e2172 100644
--- a/libs/hwui/Texture.h
+++ b/libs/hwui/Texture.h
@@ -38,6 +38,8 @@
 
         firstFilter = true;
         firstWrap = true;
+
+        id = 0;
     }
 
     void setWrap(GLenum wrap, bool bindTexture = false, bool force = false,