shell_tools: Regenate README.md with usages & format updates
shell_tools: Regenate README.md with usages & format updates

Change-Id: Id7eb52fa211388c2def35be9c74ced6091f05106
Signed-off-by: Adrian DC <01fb3892f39957945220431e7409156544d2f041@gmail.com>

AdrianDC/android_development_shell_tools,AdrianDC/android_development_shell_tools