Add min SDK to libs used for mockito-extended

libdexmakerjvmtiagent and libstaticjvmtiagent are used by tests that use
mockito-extended. Some of these tests are also run on older platforms,
such as for testing mainline modules.

The tests broke recently when change ID:
I6c5c822d0767e789fa0e2c8e5668fddfd90680bb made the binaries
incompatible. This was updated to only apply if the binary has a recent
enough min_sdk_version.

As the libraries are also used on older platforms, add min_sdk_version
to ensure compatibility. SDK version 29 seems appropriate as it is the
first version supporting mainline modules that need backwards
compatibility testing.

Test: atest NetworkStackCoverageTests
Bug: 193063817
Bug: 187907243
Original-Change: https://android-review.googlesource.com/1761245
Merged-In: Ie3645a282ad53ead5c6ddeac02fb4f7115f7dd64
Change-Id: Ie3645a282ad53ead5c6ddeac02fb4f7115f7dd64

Android.bp

diff --git a/Android.bp b/Android.bp
index 68c6895..6648cf6 100644
--- a/Android.bp
+++ b/Android.bp
@@ -127,6 +127,7 @@
         "dexmaker_agent_defaults",
     ],
     srcs: ["dexmaker-mockito-inline/src/main/jni/**/*.cc"],
+    min_sdk_version: "29",
 }
 
 // Build agent for Dexmaker's extended MockMaker
@@ -136,6 +137,7 @@
         "dexmaker_agent_defaults",
     ],
     srcs: ["dexmaker-mockito-inline-extended/src/main/jni/**/*.cc"],
+    min_sdk_version: "29",
 }
 
 // Build agent for Dexmaker's inline tests