Add apk-patch-size-estimator to //third_party.

DEPS

Index: DEPS
diff --git a/DEPS b/DEPS
index a345aeeb040689fd5c7744f8330ee41c6c013361..55bac2ddaba107a3843f1334e9620940db8ec9c7 100644
--- a/DEPS
+++ b/DEPS
@@ -720,6 +720,16 @@ hooks = [
     ],
   },
   {
+    'name': 'apk-patch-size-estimator',
+    'pattern': '.',
+    'action': ['python',
+               'src/build/android/update_deps/update_third_party_deps.py',
+               'download',
+               '-b', 'chromium-android-tools/apk-patch-size-estimator',
+               '-l', 'third_party/apk-patch-size-estimator/lib'
+    ],
+  },
+  {
     'name': 'icu4j',
     'pattern': '.',
     'action': ['python',