Add a new build, install, test development (bit) tool

This is a cleaned up version of a utility that I've had sitting around
for a while.

The bit tool can run an android platform build, then sync or install
the outputs of that, and then run instrumentation tests.  It's better
than what we usually do:

  make && adb shell stop && adb sync system && adb shell start

Here's the help text:

usage: bit OPTIONS PATTERN

  Build, sync and test android code.

  The -b -i and -t options allow you to specify which phases
  you want to run. If none of those options are given, then
  all phases are run. If any of these options are provided
  then only the listed phases are run.

  OPTIONS
  -b     Run a build
  -i     Install the targets
  -t     Run the tests

  PATTERN
  One or more targets to build, install and test. The target
  names are the names that appear in the LOCAL_MODULE or
  LOCAL_PACKAGE_NAME variables in Android.mk or Android.bp files.

  Building and installing
  -----------------------
  The modules specified will be built and then installed. If the
  files are on the system partition, they will be synced and the
  attached device rebooted. If they are APKs that aren't on the
  system partition they are installed with adb install.

  For example:
    bit framework
      Builds framework.jar, syncs the system partition and reboots.

    bit SystemUI
      Builds SystemUI.apk, syncs the system partition and reboots.

    bit CtsProtoTestCases
      Builds this CTS apk, adb installs it, but does not run any
      tests.

  Running Unit Tests
  ------------------
  To run a unit test, list the test class names and optionally the
  test method after the module.

  For example:
    bit CtsProtoTestCases:*
      Builds this CTS apk, adb installs it, and runs all the tests
      contained in that apk.

    bit framework CtsProtoTestCases:*
      Builds the framework and the apk, syncs and reboots, then
      adb installs CtsProtoTestCases.apk, and runs all tests
      contained in that apk.

    bit CtsProtoTestCases:.ProtoOutputStreamBoolTest
    bit CtsProtoTestCases:android.util.proto.cts.ProtoOutputStreamBoolTest
      Builds and installs CtsProtoTestCases.apk, and runs all the
      tests in the ProtoOutputStreamBoolTest class.

    bit CtsProtoTestCases:.ProtoOutputStreamBoolTest\#testWrite
      Builds and installs CtsProtoTestCases.apk, and runs the testWrite
      test method on that class.

    bit CtsProtoTestCases:.ProtoOutputStreamBoolTest\#testWrite,.ProtoOutputStreamBoolTest\#testRepeated
      Builds and installs CtsProtoTestCases.apk, and runs the testWrite
      and testRepeated test methods on that class.

  Launching an Activity
  ---------------------
  To launch an activity, specify the activity class name after
  the module name.

  For example:
    bit StatusBarTest:NotificationBuilderTest
    bit StatusBarTest:.NotificationBuilderTest
    bit StatusBarTest:com.android.statusbartest.NotificationBuilderTest
      Builds and installs StatusBarTest.apk, launches the
      com.android.statusbartest/.NotificationBuilderTest activity.

Change-Id: I9cff7a23852fa1a67369e7807f7ae9f6e45d6131
Test: none