libutils: Forward-port an old callstack method

Change-Id: I77a0dbc6214e662c2217f25cdf3f3883cd959bb3
libutils: CallStack: Restore original update method

Change-Id: Ie8501b2d6246204f2a4c1b1329aef57db0b9f930
libutils: Add more MediaTek backcompat hacks

Change-Id: I168ffdf5ad73ac80c121f47c6962f3644e86b1ef