Extract android components to its own script

Author: StefMa

.travis.yml

@@ -12,7 +12,7 @@ env:
 
 android:
   components:
-    - $(if [ $TEST_SUITE == "instrumentation" ]; then echo "tools,platform-tools,tools,build-tools-26.0.1,android-22,android-26,extra-google-google_play_services,extra-google-m2repository,extra-android-m2repository,addon-google_apis-google-24,sys-img-armeabi-v7a-android-22"; fi)
+    - $(if [ $TEST_SUITE == "instrumentation" ]; then ./.travisAndroidComponents.sh; fi)
 
 before_install:
   - if [ $TEST_SUITE == "unit" ]; then

.travisAndroidComponents.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+# Read the BUILD_TOOL_VERSION and COMPILE_SDK_VERSION
+BUILD_TOOLS_VERSION=$(cat build.gradle | grep "BUILD_TOOLS_VERSION*" | sed -e "s/^.*'\(.*\)'/\1/")
+COMPILE_SDK_VERSION=$(cat build.gradle | grep "COMPILE_SDK_VERSION*" | sed -e "s/^.*= \(.*\)$/\1/")
+
+# Echo every componnent we need to install and replace the BUILD_TOOLS_VERSION and COMPILE_SDK_VERSION
+echo "tools,platform-tools,tools,build-tools-$BUILD_TOOLS_VERSION,android-22,android-$COMPILE_SDK_VERSION,extra-google-google_play_services,extra-google-m2repository,extra-android-m2repository,addon-google_apis-google-24,sys-img-armeabi-v7a-android-22"