Make the default android build be release_developer.

platform_tools/android/bin/android_setup.sh

 #!/bin/bash
 ###############################################################################
 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 ###############################################################################
 #
 # android_setup.sh: Sets environment variables used by other Android scripts.
 
 # Fail-fast if anything in the script fails.
 set -e
 
-BUILDTYPE=${BUILDTYPE-Debug}
+BUILDTYPE=${BUILDTYPE-Release_Developer}
 USE_CLANG="true"
 
 while (( "$#" )); do
   if [[ "$1" == "-d" ]]; then
     DEVICE_ID=$2
     shift
   elif [[ "$1" == "-i" || "$1" == "--resourcePath" ]]; then
     RESOURCE_PATH=$2
     APP_ARGS=("${APP_ARGS[@]}" "${1}" "${2}")
     shift
   elif [[ "$1" == "-s" ]]; then
     DEVICE_SERIAL="-s $2"
     shift
   elif [[ "$1" == "-t" ]]; then
     BUILDTYPE=$2
     shift
+  elif [[ "$1" == "--debug" ]]; then
+    BUILDTYPE=Debug
   elif [[ "$1" == "--release" ]]; then
     BUILDTYPE=Release
   elif [[ "$1" == "--gcc" ]]; then
     USE_CLANG="false"
   elif [[ "$1" == "--clang" ]]; then
     USE_CLANG="true" 
   elif [[ "$1" == "--logcat" ]]; then
     LOGCAT=1
   elif [[ "$1" == "--verbose" ]]; then
     VERBOSE="true"
@@ skipping 232 matching lines @@
       $ADB $DEVICE_SERIAL shell mkdir -p "$(dirname "$ANDROID_DST")"
       $ADB $DEVICE_SERIAL push $HOST_SRC $ANDROID_DST
     fi
   fi
 
   # turn error checking back on
   set -e
 }
 
 setup_device "${DEVICE_ID}"