Use a default exclude filter for JaCoCo in Soong.

Instrumented builds should exclude certain classes from instrumenation
by default. (e.g. JaCoCo itself) Leverage the existing
DefaultJacocoExclusionFilter to do this.

Note: Two different default filters exist now (one for Make and one for
Soong), as they have different wildcard rules.

Test: EMMA_INSTRUMENT=true EMMA_INSTRUMENT_STATIC=true m -j32
TeleService and inspected the resulting temporary jar that was
instrumented to confirm that anything from org/jacoco was excluded.
Bug: 159748844

Change-Id: I5466b0a03957edfbe53971d5d1a7729fdb8337db

android/config.go

@@ -1052,7 +1052,7 @@ func (c *deviceConfig) SamplingPGO() bool {
 // represents any path.
 func (c *deviceConfig) JavaCoverageEnabledForPath(path string) bool {
 	coverage := false
-	if c.config.productVariables.JavaCoveragePaths == nil ||
+	if len(c.config.productVariables.JavaCoveragePaths) == 0 ||
 		InList("*", c.config.productVariables.JavaCoveragePaths) ||
 		HasAnyPrefix(path, c.config.productVariables.JavaCoveragePaths) {
 		coverage = true