Handle missing and invalid numeric values in XmlUtils.

Convert these errors to XmlPullParserException.

Bug: 8584433
Change-Id: I070ed517682e7f047ec00271db26110da2bebb09
Fix import after okhttp update.

OkResponseCache moved packages in change
62321.

Change-Id: I2c08c4586405e767d1931ebc5f185c7916850fa1
Merge "Fix import after okhttp update."
Merge "Handle missing and invalid numeric values in XmlUtils."