Add CollationRoot to preloaded classes

It was determined this would save RAM.

Test: ./generate-preloaded-classes.sh base.txt preloaded-classes-blacklist preloaded-classes-extra  > preloaded-classes
Test: Look at the generated file
Bug: 63444758
Change-Id: Ib49b1218e94e4a4a2211071da189cf917559248b

config/generate-preloaded-classes.sh

@@ -17,6 +17,10 @@ if [ "$#" -lt 2 ]; then
   echo "Usage $0 <input classes file> <blacklist file> [extra classes files]"
   exit 1
 fi
+
+# Write file headers first
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+cat "$DIR/copyright-header"
 echo "# Preloaded-classes filter file for phones.
 #
 # Classes in this file will be allocated into the boot image, and forcibly initialized in
@@ -25,9 +29,11 @@ echo "# Preloaded-classes filter file for phones.
 #
 # This file has been derived for mainline phone (and tablet) usage.
 #"
+
 input=$1
 blacklist=$2
 shift 2
 extra_classes_files=("$@")
-sort "$input" "${extra_classes_files[@]}" | uniq | grep -f "$blacklist" -v -F -x
 
+# Disable locale to enable lexicographical sorting
+LC_ALL=C sort "$input" "${extra_classes_files[@]}" | uniq | grep -f "$blacklist" -v -F -x

config/preloaded-classes

@@ -13,8 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-#
-#
 # Preloaded-classes filter file for phones.
 #
 # Classes in this file will be allocated into the boot image, and forcibly initialized in
@@ -1454,6 +1452,7 @@ android.icu.impl.UResource$Sink
 android.icu.impl.UResource$Table
 android.icu.impl.UResource$Value
 android.icu.impl.Utility
+android.icu.impl.coll.CollationRoot
 android.icu.impl.locale.AsciiUtil
 android.icu.impl.locale.BaseLocale
 android.icu.impl.locale.BaseLocale$Cache
@@ -2276,7 +2275,6 @@ android.util.Base64
 android.util.Base64$Coder
 android.util.Base64$Decoder
 android.util.Base64$Encoder
-android.util.TimingsTraceLog
 android.util.ContainerHelpers
 android.util.DisplayMetrics
 android.util.EventLog
@@ -2328,6 +2326,7 @@ android.util.SparseLongArray
 android.util.StateSet
 android.util.SuperNotCalledException
 android.util.TimeUtils
+android.util.TimingsTraceLog
 android.util.TypedValue
 android.util.Xml
 android.util.jar.StrictJarFile

config/preloaded-classes-extra

@@ -0,0 +1 @@
+android.icu.impl.coll.CollationRoot