[Android] Extract signing+zipaligning to python

build/android/ant/apk-package.xml

Index: build/android/ant/apk-package.xml
diff --git a/build/android/ant/apk-package.xml b/build/android/ant/apk-package.xml
index 51ceb0273c7e7f4734f25fa5cdb86b41b8f79197..12e196139516c38e00a8297ef799803efa09fdcc 100644
--- a/build/android/ant/apk-package.xml
+++ b/build/android/ant/apk-package.xml
@@ -15,7 +15,7 @@
     limitations under the License.
 -->
 
-<project default="-do-sign">
+<project default="-package">
   <property name="verbose" value="false" />
   <property name="out.dir" location="${OUT_DIR}" />
   <!-- Output directories -->
@@ -167,33 +167,4 @@
       <nativefolder path="${native.libs.absolute.dir}" />
     </apkbuilder>
   </target>
-
-
-
-  <property name="key.store" value="${KEYSTORE_PATH}"/>
-  <property name="key.store.password" value="chromium"/>
-  <property name="key.alias" value="chromiumdebugkey"/>
-  <property name="key.alias.password" value="chromium"/>
-  <property name="zipalign" location="${android.tools.dir}/zipalign" />
-
-  <!-- Signs and zipaligns the apk. -->
-  <target name="-do-sign" depends="-package">
-    <sequential>
-      <echo level="info">Signing final apk...</echo>
-      <signapk
-          input="${out.packaged.file}"
-          output="${out.unaligned.file}"
-          keystore="${key.store}"
-          storepass="${key.store.password}"
-          alias="${key.alias}"
-          keypass="${key.alias.password}" />
-
-      <zipalign
-          executable="${zipalign}"
-          input="${out.unaligned.file}"
-          output="${out.final.file}"
-          verbose="${verbose}" />
-      <echo level="info">Release Package: ${out.final.file}</echo>
-    </sequential>
-  </target>
 </project>