Increase CtsPackageManagerTestCases timeout from 5 min (default) to 10 mins

The test sometimes fails to complete within 5 mins on devices with lower compute power, like Wear devices.

Bug: 367748651
Flag: TEST_ONLY
Change-Id: If930a3c76500dc490921965a3694c56b4bdf0a94
Test: atest CtsPackageManagerTestCases