Use new assets with desaturated green.

Fix for http://b/issue?id=2390713
diff --git a/res/drawable-hdpi/textfield_voice_search.9.png b/res/drawable-hdpi/textfield_voice_search.9.png
index a1d59c6..d988493 100644
--- a/res/drawable-hdpi/textfield_voice_search.9.png
+++ b/res/drawable-hdpi/textfield_voice_search.9.png
Binary files differ
diff --git a/res/drawable-mdpi/textfield_voice_search.9.png b/res/drawable-mdpi/textfield_voice_search.9.png
index b56eaa2..5cf6592 100644
--- a/res/drawable-mdpi/textfield_voice_search.9.png
+++ b/res/drawable-mdpi/textfield_voice_search.9.png
Binary files differ