repoinit: Support detecting 'Repo Init: ' in roomservice
repoinit: Support detecting 'Repo Init: ' in roomservice

 * Syntax: <!-- Repo Init: 'repoinit... branch' -->

 * Select the proper repoinit* command based on roomservice
 * Provide the branch argument based on roomservice
 * Optionally apply options with ANDROID_REPO_INIT_OPTIONS

Change-Id: I70f37ddf4bf2ea94b7d427356277abd99465ab81
Signed-off-by: Adrian DC <01fb3892f39957945220431e7409156544d2f041@gmail.com>

AdrianDC/android_development_shell_tools,AdrianDC/android_development_shell_tools