ANDROID: Add thermal_thresholds.h to aarch64 allowlist

It was added by commit [1] and included by thermal_core.h.

[1] commit 445936f9
("thermal: core: Add user thresholds support")

Bug: 393982134
Change-Id: I1f6709273520916298923110a6b0405df4ab3eab
Signed-off-by: Jacky Liu <qsliu@google.com>