PackageManager: Skip dexopt on install for debuggable apps

To reduce install-to-started latency, skip dexopt at install-time
for debuggable apps. This is a conscious tradeoff, as the app
will run slower, and do repeated work on every startup. However,
for debuggable apps, turnaround time is more important.

Bug: 78200989
Test: m
Test: Device boots
Test: CTS (wrap & JVMTI)
Change-Id: I749934e794b0c89d72ea8ee413b845e7804de184