Fix an issue where Vehicle HAL would crash when trying to update a continuous property without an initial floating-point value

Bug: 36858992
Test: build, flash and boot

(cherry picked from commit 945d0bbc866ce21f262a1715c5a2560898c8aca1)

Merged-In: I9906abbf386cf75e838102299e3e97de3475db63
Change-Id: I19ef534fde190a3a1adaca377e8f09760c0ccf4e
2 files changed