Launcher分析

./packages/apps/Settings/res/values-zh-rCN/strings.xml:1136:    <string name="clear_activities" msgid="7408923511535174430">"清除默认设置"</string>

./frameworks/base/core/res/res/values-zh-rCN/strings.xml:1126:    <string name="whichHomeApplication" msgid="4616420172727326782">"选择主屏幕应用"</string>

/frameworks/base/core/java/com/android/internal/app/ResolverActivity.java

packages/apps/Settings/src/com/android/settings/HomeSettings.java

CATEGORY_HOME，ResolverActivity