Fixed incorrect WAC decoding

Fixed the incorrect warning area coordinate decoding
when data length is greater than 127 bytes.

Bug: 143762197
Test: unit test
Merged-In: I6d092184ab7b9897770592a5eda3619806e9f57b
(cherry picked from commit 62991d883c5b3acfc0a0f7c415647b8939ae8769)

Change-Id: I6ba1945235b38c8892560692d73bdc3338aa21c6
3 files changed