bitcoin wallet validation/vetting
Short answer: no. Imagine this scenario: a developer writes a closed-source Android wallet that becomes extremely popular. At some point the combined worth of the user wallets is $100M. The developer could have purposely left an open vulnerability, and claimed that a hacker exploited it. There would be no way to know if he was telling the truth.

Rule of thumb: keep the bulk of your BTC in cold storage. Online wallets should be treated like the wallet in your pocket. How much cash are you comfortable carrying around, knowing that you could lose your wallet and it's gone? That's how much you should have in an online wallet.