hal_configstore: use crash_dump fallback path

Configstore HAL uses a seccomp filter which blocks the standard
path of execing crash_dump to collect crash data. Add permission
to use crash_dump's fallback mechanism.

Allowing configstore to write to the socket provided by tombstoned
required either exempting configstore from a neverallow rule, or
removing the neverallow rule entirely. Since the neverallow rule
could potentially prevent partners for doing security hardening,
it has been removed.

Bug: 64768925
Bug: 36453956

Test: killall -ABRT android.hardware.configstore@1.1-service
    Results in a call stack in logcat, and tombstone in
    /data/tombstones
Test: configstore runs without crashing
Test: SANITIZE_TARGET="address coverage" make vts -j64
    vts-tradefedrun commandAndExit vts --skip-all-system-status-check \
    -primary-abi-only --skip-preconditions -l VERBOSE --module \
    VtsHalConfigstoreV1_0IfaceFuzzer

Change-Id: I1ed5265f173c760288d856adb9292c4026da43d6
(cherry picked from commit 9924d782)