Merge dev-utils update_payload_library and the paycheck.

The update_payload library is a python library for parsing and
handling update payload. This library is used by the payload checker
python script also included here.

The code is merged from this repo:
  https://chromium.googlesource.com/chromiumos/platform/dev-util/

Bug: 28797993
TEST='import update_payload'
tree: a8ead3ebdbf56da13feeb984991f51cba1f71577
  1. binder_bindings/
  2. client_library/
  3. common/
  4. dbus_bindings/
  5. include/
  6. init/
  7. payload_consumer/
  8. payload_generator/
  9. sample_images/
  10. scripts/
  11. update_manager/
  12. update_payload_key/
  13. weaved/
  14. .gitignore
  15. Android.mk
  16. binder_service_android.cc
  17. binder_service_android.h
  18. binder_service_brillo.cc
  19. binder_service_brillo.h
  20. boot_control_android.cc
  21. boot_control_android.h
  22. boot_control_chromeos.cc
  23. boot_control_chromeos.h
  24. boot_control_chromeos_unittest.cc
  25. chrome_browser_proxy_resolver.cc
  26. chrome_browser_proxy_resolver.h
  27. chrome_browser_proxy_resolver_unittest.cc
  28. common_service.cc
  29. common_service.h
  30. common_service_unittest.cc
  31. connection_manager.cc
  32. connection_manager.h
  33. connection_manager_android.cc
  34. connection_manager_android.h
  35. connection_manager_interface.h
  36. connection_manager_unittest.cc
  37. connection_utils.cc
  38. connection_utils.h
  39. daemon.cc
  40. daemon.h
  41. daemon_state_android.cc
  42. daemon_state_android.h
  43. daemon_state_interface.h
  44. dbus_connection.cc
  45. dbus_connection.h
  46. dbus_service.cc
  47. dbus_service.h
  48. dbus_test_utils.h
  49. fake_file_writer.h
  50. fake_p2p_manager.h
  51. fake_p2p_manager_configuration.h
  52. fake_shill_proxy.cc
  53. fake_shill_proxy.h
  54. fake_system_state.cc
  55. fake_system_state.h
  56. generate_pc_file.sh
  57. hardware_android.cc
  58. hardware_android.h
  59. hardware_chromeos.cc
  60. hardware_chromeos.h
  61. hardware_chromeos_unittest.cc
  62. image_properties.h
  63. image_properties_android.cc
  64. image_properties_chromeos.cc
  65. image_properties_chromeos_unittest.cc
  66. libcros_proxy.cc
  67. libcros_proxy.h
  68. libupdate_engine-client-test.pc.in
  69. libupdate_engine-client.pc.in
  70. local_coverage_rate
  71. main.cc
  72. metrics.cc
  73. metrics.h
  74. metrics_utils.cc
  75. metrics_utils.h
  76. metrics_utils_unittest.cc
  77. mock_connection_manager.h
  78. mock_file_writer.h
  79. mock_omaha_request_params.h
  80. mock_p2p_manager.h
  81. mock_payload_state.h
  82. mock_power_manager.h
  83. mock_proxy_resolver.h
  84. mock_update_attempter.h
  85. MODULE_LICENSE_APACHE2
  86. NOTICE
  87. omaha_request_action.cc
  88. omaha_request_action.h
  89. omaha_request_action_unittest.cc
  90. omaha_request_params.cc
  91. omaha_request_params.h
  92. omaha_request_params_unittest.cc
  93. omaha_response.h
  94. omaha_response_handler_action.cc
  95. omaha_response_handler_action.h
  96. omaha_response_handler_action_unittest.cc
  97. omaha_utils.cc
  98. omaha_utils.h
  99. omaha_utils_unittest.cc
  100. OWNERS
  101. p2p_manager.cc
  102. p2p_manager.h
  103. p2p_manager_unittest.cc
  104. parcelable_update_engine_status.cc
  105. parcelable_update_engine_status.h
  106. payload_state.cc
  107. payload_state.h
  108. payload_state_interface.h
  109. payload_state_unittest.cc
  110. power_manager_android.cc
  111. power_manager_android.h
  112. power_manager_chromeos.cc
  113. power_manager_chromeos.h
  114. power_manager_interface.h
  115. PRESUBMIT.cfg
  116. proxy_resolver.cc
  117. proxy_resolver.h
  118. real_system_state.cc
  119. real_system_state.h
  120. run_unittests
  121. sample_omaha_v3_response.xml
  122. service_delegate_android_interface.h
  123. service_observer_interface.h
  124. shill_proxy.cc
  125. shill_proxy.h
  126. shill_proxy_interface.h
  127. system_state.h
  128. tar_bunzip2.gypi
  129. test_http_server.cc
  130. test_subprocess.cc
  131. testrunner.cc
  132. unittest_key.pem
  133. unittest_key2.pem
  134. update_attempter.cc
  135. update_attempter.h
  136. update_attempter_android.cc
  137. update_attempter_android.h
  138. update_attempter_unittest.cc
  139. update_engine-client.gyp
  140. update_engine.conf
  141. update_engine.gyp
  142. update_engine.rc
  143. update_engine_client.cc
  144. update_engine_client_android.cc
  145. update_metadata.proto
  146. update_status_utils.cc
  147. update_status_utils.h
  148. UpdateEngine.conf
  149. utils_android.cc
  150. utils_android.h
  151. WATCHLISTS
  152. weave_service.cc
  153. weave_service.h
  154. weave_service_factory.cc
  155. weave_service_factory.h
  156. weave_service_interface.h