Fix to prevent a dex file from being verified multiple times.

Instead of verifying a dex file whenever one is initialized, they're now
verified when not opened from memory. Also, the way dalvik_system_DexFile
opens dex files has been changed to check for an existing oat file and
get the corresponding dex file from there instead.

Change-Id: I75fc26247150107d628e2c4e364ef8a53fbf9481
8 files changed
tree: b74b1fc81d0dc0b2f2da7ab6f5187493f15a0b66
  2. build/
  3. jdwpspy/
  4. src/
  5. test/
  6. tools/