Title bars on tab thumbs lightened up to increase contrast

Bug: 5375498
Change-Id: I3745b741c5fedd9ee7628331077052c427b6d83e
diff --git a/res/drawable-hdpi/nav_tab_bg.9.png b/res/drawable-hdpi/nav_tab_bg.9.png
index bccdbdc..72ae85b 100644
--- a/res/drawable-hdpi/nav_tab_bg.9.png
+++ b/res/drawable-hdpi/nav_tab_bg.9.png
Binary files differ
diff --git a/res/drawable-mdpi/nav_tab_bg.9.png b/res/drawable-mdpi/nav_tab_bg.9.png
index e539b66..717a8cf 100644
--- a/res/drawable-mdpi/nav_tab_bg.9.png
+++ b/res/drawable-mdpi/nav_tab_bg.9.png
Binary files differ
diff --git a/res/drawable-xhdpi/nav_tab_bg.9.png b/res/drawable-xhdpi/nav_tab_bg.9.png
index 299f8d4..d81bbca 100644
--- a/res/drawable-xhdpi/nav_tab_bg.9.png
+++ b/res/drawable-xhdpi/nav_tab_bg.9.png
Binary files differ