Guard against excessively long package names and certificates.

Bug: 303227969
Test: atest CtsBlobStoreTestCases
Flag: EXEMPT security fix
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:aaa1cb20b89f3389f9fbc362a397770c8052e7fb)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:6ac620330ccbd66fb20fe084082573fe1545dccc)
Merged-In: I67ae28b6bc896d57abcb45ef586595bd8aa81346
Change-Id: I67ae28b6bc896d57abcb45ef586595bd8aa81346
2 files changed