Make FinalizerTimeoutMs and ThreadSuspendTimeout system prop

Currently these are command line options for dalvikvm. Exposing them to
system property.

Bug:143848108
Test: flash device; adb shell setprop dalvik.vm.finalizer-timeout-ms
<val>; adb shell stop; adb shell start; adb shell getprop dalvik.vm.finalizer-timeout-ms

Change-Id: I3bd16ea0c4a01b7e400b3e6e67eb47cf7a26afce