The sub-project definitions are still in the object directory (and
still installed by |mach gradle-install); over time, we'll migrate
them out.

The Gradle wrapper and {settings,build}.gradle in topsrcdir are
identical to those in mobile/android/gradle.  I don't like the
duplication, but I also don't want the burden of keeping the two
configurations identical.  We'll move away from the configuration
using mobile/android/gradle as quickly as we can.

--HG--
rename : mobile/android/gradle/build.gradle => build.gradle
rename : mobile/android/gradle/gradle/wrapper/gradle-wrapper.jar => gradle/wrapper/gradle-wrapper.jar
rename : mobile/android/gradle/gradle/wrapper/gradle-wrapper.properties => gradle/wrapper/gradle-wrapper.properties
rename : mobile/android/gradle/gradlew => gradlew
rename : mobile/android/gradle/settings.gradle => settings.gradle
extra : commitid : IkXCiKfkha1
extra : rebase_source : 4142fe37cd7e036d41fb122fe31cd232fcfdfc80

--HG--
rename : mobile/android/base/docs/index.rst => mobile/android/base/docs/uitelemetry.rst