Fix image checksum verification.

Move over the separator ':' for checking subsequent dex file
checksums. The bug, introduced in
    https://android-review.googlesource.com/1091189 ,
caused rejection of oat files if the boot class path had
more than one module that was not part of the boot image.

Test: Add a new test to image_space_test.
Test: Manual fake OTA with extra logging for checksum mismatch.
Bug: 119800099
Bug: 144146443
Change-Id: I9eb8328348b30ee4769468924f9e6ac65b70d4cb
2 files changed