ANDROID: fix up Android-specific Kconfig ---help--- strings

With commit f70f74d1 ("kconfig: remove '---help---' support") the
"---help---" marking is no longer allowed in Kconfig files.
Unfortunately some old ANDROID patches used this deprecated markings,
which breaks the build.

Fix this up by converting them to the correct style "help"

Bug: 156285741
Bug: 146517987
Bug: 31622239
Bug: 120445368
Bug: 119769411
Bug: 129280212
Fixes: 7f627401 ("ANDROID: add support for vendor hooks")
Fixes: 2dec8234 ("ANDROID: gnss: Add command line test driver")
Fixes: 61156198 ("ANDROID: AVB error handler to invalidate vbmeta partition.")
Fixes: 0ce3eb37 ("ANDROID: dm-bow: Add dm-bow feature")
Cc: Todd Kjos <tkjos@google.com>
Cc: Alistair Delva <adelva@google.com>
Cc: David Zeuthen <zeuthen@google.com>
Cc: Paul Lawrence <paullawrence@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I8a503c34b5b4dac6dc3e24afbefa10223a6fd946