Do not print environment variables if ANDROID_QUIET_BUILD is set.

Test: manual
Change-Id: I17c24beb9f0008e038a739a06027266b57e17e7a

envsetup.sh

@@ -650,7 +650,6 @@ function lunch()
     export TARGET_BUILD_APPS=
 
     local product variant_and_version variant version
-
     product=${selection%%-*} # Trim everything after first dash
     variant_and_version=${selection#*-} # Trim everything up to first dash
     if [ "$variant_and_version" != "$selection" ]; then
@@ -675,7 +674,6 @@ function lunch()
     then
         return 1
     fi
-
     export TARGET_PRODUCT=$(get_build_var TARGET_PRODUCT)
     export TARGET_BUILD_VARIANT=$(get_build_var TARGET_BUILD_VARIANT)
     if [ -n "$version" ]; then
@@ -685,10 +683,10 @@ function lunch()
     fi
     export TARGET_BUILD_TYPE=release
 
-    echo
+    [[ -n "${ANDROID_QUIET_BUILD:-}" ]] || echo
 
     set_stuff_for_environment
-    printconfig
+    [[ -n "${ANDROID_QUIET_BUILD:-}" ]] || printconfig
     destroy_build_var_cache
 }