Fixed ContentCapture and AugmentedAutofill methods that should not hold the main lock...

...otherwise they could ANR the ActivityManagerService and crash the system

Test: manual verification
Test: atest AugmentedLoginActivityTest
Test: atest CtsContentCaptureServiceTestCases # sanity check (minus usual flakiness)

Fixes: 129410913
Bug: 126266412

Change-Id: I4b0b0c389dd2c34928c6fffeec2854518a5e7da1